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<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2020-03-18T15:12:10.3803041+00:00 -->
<!-- Version            : 5.0.1.369 -->
<!-- Package ID         : 770616922687464f88b98b003dd748ad -->
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    <link:label xml:lang="en-US" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Home Loan Bank stock, at cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankStock" xlink:to="us-gaap_FederalHomeLoanBankStock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetReportedAmount" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableNetReportedAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableNetReportedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans, net of allowance for loan losses ($27,870 at 12/31/19 and $23,774 at 12/31/18)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableNetReportedAmount" xlink:to="us-gaap_LoansAndLeasesReceivableNetReportedAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableNetReportedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Net Reported Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestReceivable" xlink:type="locator" xlink:label="us-gaap_InterestReceivable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestReceivable" xlink:to="us-gaap_InterestReceivable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premises and equipment, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssets" xlink:type="locator" xlink:label="us-gaap_OtherAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssets" xlink:to="us-gaap_OtherAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:type="locator" xlink:label="us-gaap_Assets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LIABILITIES AND STOCKHOLDERS&#8217; EQUITY</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities And Stockholders Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_LiabilitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepositsAbstract" xlink:type="locator" xlink:label="us-gaap_DepositsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositsAbstract" xlink:to="us-gaap_DepositsAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposits [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoninterestBearingDepositLiabilities" xlink:type="locator" xlink:label="us-gaap_NoninterestBearingDepositLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestBearingDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-interest bearing</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoninterestBearingDepositLiabilities" xlink:to="us-gaap_NoninterestBearingDepositLiabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestBearingDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Bearing Deposit Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestBearingDepositLiabilities" xlink:type="locator" xlink:label="us-gaap_InterestBearingDepositLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest bearing</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestBearingDepositLiabilities" xlink:to="us-gaap_InterestBearingDepositLiabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Deposit Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Deposits" xlink:type="locator" xlink:label="us-gaap_Deposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Deposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total deposits</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Deposits" xlink:to="us-gaap_Deposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Deposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:type="locator" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest payable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPayableCurrentAndNoncurrent" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable Current And Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubordinatedDebt" xlink:type="locator" xlink:label="us-gaap_SubordinatedDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubordinatedDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated debt, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubordinatedDebt" xlink:to="us-gaap_SubordinatedDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubordinatedDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilities" xlink:type="locator" xlink:label="us-gaap_OtherLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilities" xlink:to="us-gaap_OtherLiabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:type="locator" xlink:label="us-gaap_Liabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Liabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Liabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:type="locator" xlink:label="us-gaap_CommitmentsAndContingencies" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies (Note 16)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_StockholdersEquityAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders&#8217; equity:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValue" xlink:type="locator" xlink:label="us-gaap_CommonStockValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock $0.2083 par value; 48,000 shares authorized; 9,704 and 9,679 shares issued and 9,672 and 9,646 shares outstanding at 12/31/19 and 12/31/18, respectively</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockValue" xlink:type="locator" xlink:label="us-gaap_PreferredStockValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock $100 par value; 300 shares authorized; 9.8 shares issued and outstanding</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:type="locator" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional paid-in capital, Common stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalCommonStock" xlink:to="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid In Capital Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalPreferredStock" xlink:type="locator" xlink:label="us-gaap_AdditionalPaidInCapitalPreferredStock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalPreferredStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional paid-in capital, Preferred stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalPreferredStock" xlink:to="us-gaap_AdditionalPaidInCapitalPreferredStock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalPreferredStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid In Capital Preferred Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="locator" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retained earnings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings Accumulated Deficit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="locator" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive loss</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income Loss Net Of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockCommonValue" xlink:type="locator" xlink:label="us-gaap_TreasuryStockCommonValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockCommonValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Common stock in treasury, at cost (32 shares)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockCommonValue" xlink:to="us-gaap_TreasuryStockCommonValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockCommonValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock Common Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:type="locator" xlink:label="us-gaap_StockholdersEquity" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total stockholders&#8217; equity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Shares Outstanding</link:label>
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    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ServiceChargesAndFees" xlink:type="locator" xlink:label="bkgm_ServiceChargesAndFees" />
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    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_OtherRealEstateOwnedExpense" xlink:type="locator" xlink:label="bkgm_OtherRealEstateOwnedExpense" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpenseTimeDeposits" xlink:type="locator" xlink:label="us-gaap_InterestExpenseTimeDeposits" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpense" xlink:type="locator" xlink:label="us-gaap_InterestExpense" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:type="locator" xlink:label="us-gaap_InterestIncomeExpenseNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeExpenseNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net interest income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeExpenseNet" xlink:to="us-gaap_InterestIncomeExpenseNet_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProvisionForLoanAndLeaseLosses" xlink:type="locator" xlink:label="us-gaap_ProvisionForLoanAndLeaseLosses" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss" xlink:type="locator" xlink:label="us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net interest income, after provision for loan losses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss" xlink:to="us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income Expense After Provision For Loan Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoninterestIncomeAbstract" xlink:type="locator" xlink:label="us-gaap_NoninterestIncomeAbstract" />
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    <link:label xml:lang="en-US" xlink:label="bkgm_ServiceChargesAndFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Service charges and fees</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtAndEquitySecuritiesGainLoss" xlink:type="locator" xlink:label="us-gaap_DebtAndEquitySecuritiesGainLoss" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtAndEquitySecuritiesGainLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gains (losses) on sale of investment securities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtAndEquitySecuritiesGainLoss" xlink:to="us-gaap_DebtAndEquitySecuritiesGainLoss_lbl" />
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    <link:label xml:lang="en-US" xlink:label="bkgm_IncomeFromMerchantServicesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income from merchant services, net</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgm_CardholdersIncomeNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cardholders income, net</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_CardholdersIncomeNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cardholders Income Net</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_NoninterestIncomeTrusteeFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trustee fees</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_NoninterestIncomeTrusteeFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Income Trustee Fees</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoninterestIncomeOther" xlink:type="locator" xlink:label="us-gaap_NoninterestIncomeOther" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestIncomeOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestIncomeOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Income Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoninterestIncome" xlink:type="locator" xlink:label="us-gaap_NoninterestIncome" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total non-interest income</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoninterestExpenseAbstract" xlink:type="locator" xlink:label="us-gaap_NoninterestExpenseAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestExpenseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-interest expense:</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LaborAndRelatedExpense" xlink:type="locator" xlink:label="us-gaap_LaborAndRelatedExpense" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LaborAndRelatedExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Labor And Related Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OccupancyNet" xlink:type="locator" xlink:label="us-gaap_OccupancyNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OccupancyNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Occupancy</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OccupancyNet" xlink:to="us-gaap_OccupancyNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OccupancyNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Occupancy Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquipmentExpense" xlink:type="locator" xlink:label="us-gaap_EquipmentExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquipmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equipment and depreciation</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_EquipmentExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equipment Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeneralInsuranceExpense" xlink:type="locator" xlink:label="us-gaap_GeneralInsuranceExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GeneralInsuranceExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Insurance</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_GeneralInsuranceExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">General Insurance Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Communication" xlink:type="locator" xlink:label="us-gaap_Communication" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Communication_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Telecommunications</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FederalDepositInsuranceCorporationPremiumExpense" xlink:type="locator" xlink:label="us-gaap_FederalDepositInsuranceCorporationPremiumExpense" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalDepositInsuranceCorporationPremiumExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Deposit Insurance Corporation Premium Expense</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProfessionalFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Professional services</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProfessionalFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Professional Fees</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProfessionalAndContractServicesExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract services</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProfessionalAndContractServicesExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Professional And Contract Services Expense</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total non-interest expense</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Expense</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockMember" xlink:type="locator" xlink:label="us-gaap_PreferredStockMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Stock [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockMember" xlink:to="us-gaap_PreferredStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AdditionalPaidInCapitalCommonStockMember" xlink:type="locator" xlink:label="bkgm_AdditionalPaidInCapitalCommonStockMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AdditionalPaidInCapitalCommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional paid in capital common stock.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AdditionalPaidInCapitalCommonStockMember" xlink:to="bkgm_AdditionalPaidInCapitalCommonStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AdditionalPaidInCapitalCommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in Capital - Common [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AdditionalPaidInCapitalCommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid In Capital Common Stock [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AdditionalPaidInCapitalPreferredStockMember" xlink:type="locator" xlink:label="bkgm_AdditionalPaidInCapitalPreferredStockMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AdditionalPaidInCapitalPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional paid in capital preferred stock.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AdditionalPaidInCapitalPreferredStockMember" xlink:to="bkgm_AdditionalPaidInCapitalPreferredStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AdditionalPaidInCapitalPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in Capital - Preferred [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AdditionalPaidInCapitalPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid In Capital Preferred Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:type="locator" xlink:label="us-gaap_RetainedEarningsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retained Earnings [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:type="locator" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Loss [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockMember" xlink:type="locator" xlink:label="us-gaap_TreasuryStockMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury Stock [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockMember" xlink:to="us-gaap_TreasuryStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:type="locator" xlink:label="us-gaap_StatementLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning Balances</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesIssued" xlink:type="locator" xlink:label="us-gaap_SharesIssued" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning Balance, Shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssued" xlink:to="us-gaap_SharesIssued_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:type="locator" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comprehensive income:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:to="us-gaap_ComprehensiveIncomeNetOfTaxAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income Net Of Tax [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification" xlink:type="locator" xlink:label="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification related to adoption of new accounting standard</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification" xlink:to="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:type="locator" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in accumulated other comprehensive income:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized gain on available-for-sale securities</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_StockIssuedDuringPeriodValueEmployeeStockPurchasePlanAndServiceAward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock issued under Employee Stock Purchase Plan &amp; Service Awards</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_StockIssuedDuringPeriodValueEmployeeStockPurchasePlanAndServiceAward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Employee Stock Purchase Plan And Service Award</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanAndServiceAward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock issued under Employee Stock Purchase Plan &amp; Service Awards, Shares</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanAndServiceAward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Employee Stock Purchase Plan And Service Award</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock issued</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value New Issues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock issued, Shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares New Issues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:type="locator" xlink:label="us-gaap_DividendsCommonStockCash" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cash dividends on common stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsCommonStockCash" xlink:to="us-gaap_DividendsCommonStockCash_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Common Stock Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:type="locator" xlink:label="us-gaap_DividendsPreferredStockCash" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsPreferredStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cash dividends on preferred stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPreferredStockCash" xlink:to="us-gaap_DividendsPreferredStockCash_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsPreferredStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Preferred Stock Cash</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balances</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance, Shares</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_HeldToMaturitySecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax" xlink:type="locator" xlink:label="bkgm_HeldToMaturitySecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="bkgm_HeldToMaturitySecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Held to maturity securities change in net unrealized holding gain loss net of tax.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_HeldToMaturitySecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax" xlink:to="bkgm_HeldToMaturitySecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax" xlink:type="locator" xlink:label="bkgm_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Available-for-sale securities change in net unrealized gain (loss), net of tax.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax" xlink:to="bkgm_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_InitialRecognitionOfRightOfUseAsset" xlink:type="locator" xlink:label="bkgm_InitialRecognitionOfRightOfUseAsset" />
    <link:label xml:lang="en-US" xlink:label="bkgm_InitialRecognitionOfRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Initial recognition of right-of-use asset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_InitialRecognitionOfRightOfUseAsset" xlink:to="bkgm_InitialRecognitionOfRightOfUseAsset_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_InitialRecognitionOfLeaseLiability" xlink:type="locator" xlink:label="bkgm_InitialRecognitionOfLeaseLiability" />
    <link:label xml:lang="en-US" xlink:label="bkgm_InitialRecognitionOfLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Initial recognition of lease liability.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_InitialRecognitionOfLeaseLiability" xlink:to="bkgm_InitialRecognitionOfLeaseLiability_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_SupplementalDisclosureOfCashFlowInformationAbstract" xlink:type="locator" xlink:label="bkgm_SupplementalDisclosureOfCashFlowInformationAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SupplementalDisclosureOfCashFlowInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Supplemental disclosure of cash flow information.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_SupplementalDisclosureOfCashFlowInformationAbstract" xlink:to="bkgm_SupplementalDisclosureOfCashFlowInformationAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Of Cash Flows [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from operating activities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:type="locator" xlink:label="us-gaap_ProfitLoss" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProfitLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProfitLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Profit Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net income to net cash provided by operating activities:</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Depreciation" xlink:type="locator" xlink:label="us-gaap_Depreciation" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depreciation" xlink:to="us-gaap_Depreciation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgm_AmortizationOfDebtIssuanceCostsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Debt Issuance Costs Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:type="locator" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amortization of fees, discounts and premiums</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:to="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accretion Amortization Of Discounts And Premiums Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainsLossesOnSalesOfOtherRealEstate" xlink:type="locator" xlink:label="us-gaap_GainsLossesOnSalesOfOtherRealEstate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainsLossesOnSalesOfOtherRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss on sales of other real estate owned, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainsLossesOnSalesOfOtherRealEstate" xlink:to="us-gaap_GainsLossesOnSalesOfOtherRealEstate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainsLossesOnSalesOfOtherRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Gains Losses On Sales Of Other Real Estate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from sales of loans held for sale</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale" xlink:to="us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Sale And Collection Of Loans Heldforsale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale" xlink:type="locator" xlink:label="us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Origination of loans held for sale</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale" xlink:to="us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Origination And Purchases Of Loans Held For Sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MortgageServicingRightsMSRImpairmentRecovery" xlink:type="locator" xlink:label="us-gaap_MortgageServicingRightsMSRImpairmentRecovery" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MortgageServicingRightsMSRImpairmentRecovery_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in mortgage servicing rights</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MortgageServicingRightsMSRImpairmentRecovery" xlink:to="us-gaap_MortgageServicingRightsMSRImpairmentRecovery_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MortgageServicingRightsMSRImpairmentRecovery_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Mortgage Servicing Rights M S R Impairment Recovery</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtAndEquitySecuritiesGainLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">(Gains) losses on sale of investment securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:type="locator" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Realized gains (losses) on sale of premises and equipment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:to="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Sale Of Property Plant Equipment</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_NonCashLeaseExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncash lease expense</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_NonCashLeaseExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Non Cash Lease Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in operating assets and liabilities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Operating Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accrued interest receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:to="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Accrued Interest Receivable Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Other Operating Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest payable</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Interest Payable Net</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_IncreaseDecreaseInLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liability</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_IncreaseDecreaseInLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Lease Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Other Operating Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by operating activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from investing activities:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Increased investment in unconsolidated subsidiary</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments To Acquire Interest In Subsidiaries And Affiliates</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of available-for-sale securities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:to="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments To Acquire Available For Sale Securities Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from sales of available-for-sale securities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" xlink:to="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Sale Of Available For Sale Securities Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:type="locator" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturities, prepayments and calls of available-for-sale securities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities" xlink:type="locator" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForProceedsFromLoansAndLeases_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Proceeds From Loans And Leases</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_IncomeFromEquityInvestmentInUnconsolidatedSubsidiary_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Income from equity investment in unconsolidated subsidiary</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_IncomeFromEquityInvestmentInUnconsolidatedSubsidiary_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income From Equity Investment In Unconsolidated Subsidiary</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashDividendsPaidToParentCompanyByUnconsolidatedSubsidiaries" xlink:type="locator" xlink:label="us-gaap_CashDividendsPaidToParentCompanyByUnconsolidatedSubsidiaries" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashDividendsPaidToParentCompanyByUnconsolidatedSubsidiaries_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends received from unconsolidated subsidiary</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashDividendsPaidToParentCompanyByUnconsolidatedSubsidiaries" xlink:to="us-gaap_CashDividendsPaidToParentCompanyByUnconsolidatedSubsidiaries_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashDividendsPaidToParentCompanyByUnconsolidatedSubsidiaries_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash Dividends Paid To Parent Company By Unconsolidated Subsidiaries</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForProceedsFromFederalHomeLoanBankStock" xlink:type="locator" xlink:label="us-gaap_PaymentsForProceedsFromFederalHomeLoanBankStock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForProceedsFromFederalHomeLoanBankStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Proceeds (costs) of FHLB stock purchase</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForProceedsFromFederalHomeLoanBankStock" xlink:to="us-gaap_PaymentsForProceedsFromFederalHomeLoanBankStock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForProceedsFromFederalHomeLoanBankStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Proceeds From Federal Home Loan Bank Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleOfOtherRealEstate" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleOfOtherRealEstate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfOtherRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from sales of other real estate owned</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleOfOtherRealEstate" xlink:to="us-gaap_ProceedsFromSaleOfOtherRealEstate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfOtherRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Sale Of Other Real Estate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from sales of premises and equipment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:to="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Sale Of Property Plant And Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of premises and equipment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments To Acquire Property Plant And Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash (used in) provided by investing activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from financing activities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Financing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInDeposits" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net increase (decrease) in deposits</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeposits" xlink:to="us-gaap_IncreaseDecreaseInDeposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSubordinatedLongTermDebt" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfSubordinatedLongTermDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfSubordinatedLongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of subordinated debt, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfSubordinatedLongTermDebt" xlink:to="us-gaap_ProceedsFromIssuanceOfSubordinatedLongTermDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfSubordinatedLongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Subordinated Long Term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:type="locator" xlink:label="us-gaap_PaymentsOfDividendsCommonStock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfDividendsCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividends paid</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsOfDividendsCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments Of Dividends Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by (used in) financing activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net change in cash, cash equivalents and restricted cash</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash, cash equivalents and restricted cash at beginning of period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash, cash equivalents and restricted cash at end of period</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_SupplementalDisclosureOfCashFlowInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosure of cash flow information:</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_SupplementalDisclosureOfCashFlowInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Disclosure Of Cash Flow Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SupplementalCashFlowElementsAbstract" xlink:type="locator" xlink:label="us-gaap_SupplementalCashFlowElementsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SupplementalCashFlowElementsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid during the period for:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_SupplementalCashFlowElementsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Cash Flow Elements [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestPaidNet" xlink:type="locator" xlink:label="us-gaap_InterestPaidNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Paid Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:type="locator" xlink:label="us-gaap_IncomeTaxesPaidNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income taxes</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes Paid Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" />
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    <link:label xml:lang="en-US" xlink:label="bkgm_HeldToMaturitySecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized loss on held-to-maturity securities, net of tax</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgm_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized gain (loss) on available-for-sale securities, net of tax</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Available For Sale Securities Change In Net Unrealized Gain Loss Net Of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TransferOfOtherRealEstate" xlink:type="locator" xlink:label="us-gaap_TransferOfOtherRealEstate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TransferOfOtherRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other real estate owned transferred to loans, net</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgm_ScheduleOfCreditLossRelatedToFinancingReceivablesCurrentAndNoncurrentTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loan Balances and Related Allowance for Loan Losses, by Portfolio Type</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PastDueFinancingReceivablesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_PastDueFinancingReceivablesTableTextBlock" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans on Non-Accrual Status, by Portfolio</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairedFinancingReceivablesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivablesTableTextBlock" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock" />
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    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_DepositLiabilitiesTableTextBlock" xlink:type="locator" xlink:label="bkgm_DepositLiabilitiesTableTextBlock" />
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    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis" xlink:type="locator" xlink:label="srt_StatementGeographicalAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_StatementGeographicalAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Geographical [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:type="locator" xlink:label="srt_SegmentGeographicalDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_SegmentGeographicalDomain" xlink:to="srt_SegmentGeographicalDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment Geographical [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_GU" xlink:type="locator" xlink:label="country_GU" />
    <link:label xml:lang="en-US" xlink:label="country_GU_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Guam [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_GU" xlink:to="country_GU_lbl" />
    <link:label xml:lang="en-US" xlink:label="country_GU_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">GUAM</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_MP" xlink:type="locator" xlink:label="country_MP" />
    <link:label xml:lang="en-US" xlink:label="country_MP_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CNMI [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_MP" xlink:to="country_MP_lbl" />
    <link:label xml:lang="en-US" xlink:label="country_MP_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">NORTHERN MARIANA ISLANDS</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_FM" xlink:type="locator" xlink:label="country_FM" />
    <link:label xml:lang="en-US" xlink:label="country_FM_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">FSM [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_FM" xlink:to="country_FM_lbl" />
    <link:label xml:lang="en-US" xlink:label="country_FM_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">MICRONESIA, FEDERATED STATES OF</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_MH" xlink:type="locator" xlink:label="country_MH" />
    <link:label xml:lang="en-US" xlink:label="country_MH_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RMI [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_MH" xlink:to="country_MH_lbl" />
    <link:label xml:lang="en-US" xlink:label="country_MH_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">MARSHALL ISLANDS</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_PW" xlink:type="locator" xlink:label="country_PW" />
    <link:label xml:lang="en-US" xlink:label="country_PW_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ROP [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_PW" xlink:to="country_PW_lbl" />
    <link:label xml:lang="en-US" xlink:label="country_PW_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">PALAU</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_SanFranciscoCaliforniaMember" xlink:type="locator" xlink:label="bkgm_SanFranciscoCaliforniaMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SanFranciscoCaliforniaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">San Francisco, California.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_SanFranciscoCaliforniaMember" xlink:to="bkgm_SanFranciscoCaliforniaMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SanFranciscoCaliforniaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">San Francisco, California [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_SanFranciscoCaliforniaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">San Francisco California [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:type="locator" xlink:label="us-gaap_SegmentReportingInformationLineItems" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingInformationLineItems" xlink:to="us-gaap_SegmentReportingInformationLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Information [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfStores" xlink:type="locator" xlink:label="us-gaap_NumberOfStores" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfStores_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of branches</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfStores" xlink:to="us-gaap_NumberOfStores_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfStores_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Stores</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of shares acquire</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage" xlink:to="us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Step Acquisition Equity Interest In Acquiree Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of Voting common stock acquire</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:to="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Percentage Of Voting Interests Acquired</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_CashReservesAgainstDepositAccounts" xlink:type="locator" xlink:label="bkgm_CashReservesAgainstDepositAccounts" />
    <link:label xml:lang="en-US" xlink:label="bkgm_CashReservesAgainstDepositAccounts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash reserves against deposit accounts.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_CashReservesAgainstDepositAccounts" xlink:to="bkgm_CashReservesAgainstDepositAccounts_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_RegulatoryAssetsAbstract" xlink:type="locator" xlink:label="bkgm_RegulatoryAssetsAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgm_RegulatoryAssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Regulatory assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_RegulatoryAssetsAbstract" xlink:to="bkgm_RegulatoryAssetsAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_RegulatoryAssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Assets [Abstract]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_SummaryOfSignificantAccountingPoliciesLineItems" xlink:type="locator" xlink:label="bkgm_SummaryOfSignificantAccountingPoliciesLineItems" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of significant accounting policies.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_SummaryOfSignificantAccountingPoliciesLineItems" xlink:to="bkgm_SummaryOfSignificantAccountingPoliciesLineItems_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_SummaryOfSignificantAccountingPoliciesTable" xlink:type="locator" xlink:label="bkgm_SummaryOfSignificantAccountingPoliciesTable" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SummaryOfSignificantAccountingPoliciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of significant accounting policies.</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgm_SummaryOfSignificantAccountingPoliciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Significant Accounting Policies [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis" xlink:type="locator" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:type="locator" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and Cash Equivalents</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_BankOfGuamTrustDepartmentCustomerMember" xlink:type="locator" xlink:label="bkgm_BankOfGuamTrustDepartmentCustomerMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BankOfGuamTrustDepartmentCustomerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Bank of Guam Trust Department Customer [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_BankOfGuamTrustDepartmentCustomerMember" xlink:to="bkgm_BankOfGuamTrustDepartmentCustomerMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BankOfGuamTrustDepartmentCustomerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank of Guam Trust Department Customer [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_BankOfGuamTrustDepartmentCustomerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bank Of Guam Trust Department Customer [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_BankerLoanProcessingProgramMember" xlink:type="locator" xlink:label="bkgm_BankerLoanProcessingProgramMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BankerLoanProcessingProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Banker Loan Processing Program [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_BankerLoanProcessingProgramMember" xlink:to="bkgm_BankerLoanProcessingProgramMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BankerLoanProcessingProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Banker Loan Processing Program [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_BankerLoanProcessingProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Banker Loan Processing Program [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment By Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LandAndBuildingMember" xlink:type="locator" xlink:label="us-gaap_LandAndBuildingMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LandAndBuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premises [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LandAndBuildingMember" xlink:to="us-gaap_LandAndBuildingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LandAndBuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Land And Building [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:type="locator" xlink:label="us-gaap_FurnitureAndFixturesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Furniture and Equipment [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FurnitureAndFixturesMember" xlink:to="us-gaap_FurnitureAndFixturesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Furniture And Fixtures [Member]</link:label>
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    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ForeignIncomeTaxEffectiveRate" xlink:type="locator" xlink:label="bkgm_ForeignIncomeTaxEffectiveRate" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" />
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    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_DirectorMember" xlink:type="locator" xlink:label="srt_DirectorMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeAxis" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubordinatedDebtMember" xlink:type="locator" xlink:label="us-gaap_SubordinatedDebtMember" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_SubordinatedDebtMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Debt [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xlink:type="locator" xlink:label="us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged" xlink:type="locator" xlink:label="us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment securities at carrying value, pledged</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGain" xlink:type="locator" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleRealizedGain" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities Available For Sale Realized Gain</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss" xlink:type="locator" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross realized losses from sales</link:label>
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    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_EstimatedAverageRemainingLifeSecurities" xlink:type="locator" xlink:label="bkgm_EstimatedAverageRemainingLifeSecurities" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Available For Sale Securities Debt Maturities Within One Year Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AutomobileLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Automobile Loan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConstructionLoansMember" xlink:type="locator" xlink:label="us-gaap_ConstructionLoansMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConstructionLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial Construction Loan [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConstructionLoansMember" xlink:to="us-gaap_ConstructionLoansMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConstructionLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Construction Loans [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ConsumerOtherFinancingReceivablesMember" xlink:type="locator" xlink:label="bkgm_ConsumerOtherFinancingReceivablesMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ConsumerOtherFinancingReceivablesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Consumer other financing receivables.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ConsumerOtherFinancingReceivablesMember" xlink:to="bkgm_ConsumerOtherFinancingReceivablesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ConsumerOtherFinancingReceivablesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Consumer Loans [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ConsumerOtherFinancingReceivablesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Other Financing Receivables [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_CommercialMortgageFinancingReceivableMember" xlink:type="locator" xlink:label="bkgm_CommercialMortgageFinancingReceivableMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_CommercialMortgageFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial mortgage financing receivable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_CommercialMortgageFinancingReceivableMember" xlink:to="bkgm_CommercialMortgageFinancingReceivableMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_CommercialMortgageFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial Mortgage [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_CommercialMortgageFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Mortgage Financing Receivable [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_CommercialAndIndustrialFinancingReceivableMember" xlink:type="locator" xlink:label="bkgm_CommercialAndIndustrialFinancingReceivableMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_CommercialAndIndustrialFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial and industrial financing receivable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_CommercialAndIndustrialFinancingReceivableMember" xlink:to="bkgm_CommercialAndIndustrialFinancingReceivableMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_CommercialAndIndustrialFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial &amp; Industrial [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_CommercialAndIndustrialFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial And Industrial Financing Receivable [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HomeEquityMember" xlink:type="locator" xlink:label="us-gaap_HomeEquityMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_HomeEquityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Home Equity [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HomeEquityMember" xlink:to="us-gaap_HomeEquityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_HomeEquityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Home Equity [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResidentialMortgageMember" xlink:type="locator" xlink:label="us-gaap_ResidentialMortgageMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResidentialMortgageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Residential Mortgage Loans [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResidentialMortgageMember" xlink:to="us-gaap_ResidentialMortgageMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResidentialMortgageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Residential Mortgage [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis" xlink:type="locator" xlink:label="us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Type of Borrower</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis" xlink:to="us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Financing Receivable Type Of Borrower [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain" xlink:type="locator" xlink:label="us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Financing Receivable, Type of Borrower</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain" xlink:to="us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Financing Receivable Type Of Borrower [Domain]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_BankruptcyBorrowerOneMember" xlink:type="locator" xlink:label="bkgm_BankruptcyBorrowerOneMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BankruptcyBorrowerOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Bankruptcy Borrower One.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_BankruptcyBorrowerOneMember" xlink:to="bkgm_BankruptcyBorrowerOneMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BankruptcyBorrowerOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bankruptcy Borrower One [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_BankruptcyBorrowerOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bankruptcy Borrower One [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_BankruptcyBorrowerTwoMember" xlink:type="locator" xlink:label="bkgm_BankruptcyBorrowerTwoMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BankruptcyBorrowerTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Bankruptcy Borrower Two .</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_BankruptcyBorrowerTwoMember" xlink:to="bkgm_BankruptcyBorrowerTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BankruptcyBorrowerTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bankruptcy Borrower Two [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_BankruptcyBorrowerTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bankruptcy Borrower Two [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InternalCreditAssessmentAxis" xlink:type="locator" xlink:label="us-gaap_InternalCreditAssessmentAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Internal Credit Assessment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InternalCreditAssessmentAxis" xlink:to="us-gaap_InternalCreditAssessmentAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Internal Credit Assessment [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InternalCreditAssessmentDomain" xlink:type="locator" xlink:label="us-gaap_InternalCreditAssessmentDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Internal Credit Assessment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InternalCreditAssessmentDomain" xlink:to="us-gaap_InternalCreditAssessmentDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Internal Credit Assessment [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PassMember" xlink:type="locator" xlink:label="us-gaap_PassMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PassMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pass [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PassMember" xlink:to="us-gaap_PassMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PassMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pass [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_SpecialMentionToPassMember" xlink:type="locator" xlink:label="bkgm_SpecialMentionToPassMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SpecialMentionToPassMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Special mention to pass.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_SpecialMentionToPassMember" xlink:to="bkgm_SpecialMentionToPassMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SpecialMentionToPassMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Special Mention to Pass [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_SpecialMentionToPassMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Special Mention To Pass [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PassToSubstandardMember" xlink:type="locator" xlink:label="bkgm_PassToSubstandardMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PassToSubstandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Pass to Substandard</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PassToSubstandardMember" xlink:to="bkgm_PassToSubstandardMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PassToSubstandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pass to Substandard [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PassToSubstandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pass To Substandard [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoanRestructuringModificationAxis" xlink:type="locator" xlink:label="us-gaap_LoanRestructuringModificationAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoanRestructuringModificationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loan Restructuring Modification</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoanRestructuringModificationAxis" xlink:to="us-gaap_LoanRestructuringModificationAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoanRestructuringModificationAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loan Restructuring Modification [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoanRestructuringModificationDomain" xlink:type="locator" xlink:label="us-gaap_LoanRestructuringModificationDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoanRestructuringModificationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loan Restructuring Modification</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoanRestructuringModificationDomain" xlink:to="us-gaap_LoanRestructuringModificationDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoanRestructuringModificationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loan Restructuring Modification [Domain]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ReclassificationOfThreeLoansMember" xlink:type="locator" xlink:label="bkgm_ReclassificationOfThreeLoansMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ReclassificationOfThreeLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification of Three Loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ReclassificationOfThreeLoansMember" xlink:to="bkgm_ReclassificationOfThreeLoansMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ReclassificationOfThreeLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification Of Three Loans [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ReclassificationOfThreeLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification Of Three Loans [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ReclassificationOfTwoLoansMember" xlink:type="locator" xlink:label="bkgm_ReclassificationOfTwoLoansMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ReclassificationOfTwoLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification of Two Loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ReclassificationOfTwoLoansMember" xlink:to="bkgm_ReclassificationOfTwoLoansMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ReclassificationOfTwoLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification Of Two Loans [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ReclassificationOfTwoLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification Of Two Loans [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SpecialMentionMember" xlink:type="locator" xlink:label="us-gaap_SpecialMentionMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SpecialMentionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Special Mention [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SpecialMentionMember" xlink:to="us-gaap_SpecialMentionMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SpecialMentionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Special Mention [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_SpecialMentionToSubStandardMember" xlink:type="locator" xlink:label="bkgm_SpecialMentionToSubStandardMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SpecialMentionToSubStandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Special Mention To Sub standard.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_SpecialMentionToSubStandardMember" xlink:to="bkgm_SpecialMentionToSubStandardMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SpecialMentionToSubStandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Special Mention To Substandard [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_SpecialMentionToSubStandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Special Mention To Sub Standard [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubstandardMember" xlink:type="locator" xlink:label="us-gaap_SubstandardMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubstandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Substandard [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubstandardMember" xlink:to="us-gaap_SubstandardMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubstandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Substandard [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FormulaMember" xlink:type="locator" xlink:label="bkgm_FormulaMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FormulaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Formula.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_FormulaMember" xlink:to="bkgm_FormulaMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FormulaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Formula Classified [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FormulaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Formula [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DoubtfulMember" xlink:type="locator" xlink:label="us-gaap_DoubtfulMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DoubtfulMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Doubtful [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DoubtfulMember" xlink:to="us-gaap_DoubtfulMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DoubtfulMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Doubtful [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:type="locator" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Notes And Loans Receivable [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Notes And Loans Receivable [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LoanAndLeaseReceivableNumberOfLoanOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of loans outstanding</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LoanAndLeaseReceivableNumberOfLoanOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loan And Lease Receivable Number Of Loan Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansAndLeasesReceivableDeferredIncome" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableDeferredIncome" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableDeferredIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred fee (income) costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableDeferredIncome" xlink:to="us-gaap_LoansAndLeasesReceivableDeferredIncome_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableDeferredIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Deferred Income</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PercentageOfLoanAggregateLoanPortfolio" xlink:type="locator" xlink:label="bkgm_PercentageOfLoanAggregateLoanPortfolio" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfLoanAggregateLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of loan aggregate loan portfolio.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PercentageOfLoanAggregateLoanPortfolio" xlink:to="bkgm_PercentageOfLoanAggregateLoanPortfolio_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PercentageOfLoanOnCommercialLoanPortfolio" xlink:type="locator" xlink:label="bkgm_PercentageOfLoanOnCommercialLoanPortfolio" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfLoanOnCommercialLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of loan on commercial loan portfolio.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PercentageOfLoanOnCommercialLoanPortfolio" xlink:to="bkgm_PercentageOfLoanOnCommercialLoanPortfolio_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PercentageOfLoanOnConsumerLoanPortfolio" xlink:type="locator" xlink:label="bkgm_PercentageOfLoanOnConsumerLoanPortfolio" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfLoanOnConsumerLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of loan on consumer loan portfolio.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PercentageOfLoanOnConsumerLoanPortfolio" xlink:to="bkgm_PercentageOfLoanOnConsumerLoanPortfolio_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_LoanPortfolioAbstract" xlink:type="locator" xlink:label="bkgm_LoanPortfolioAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LoanPortfolioAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loan portfolio.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_LoanPortfolioAbstract" xlink:to="bkgm_LoanPortfolioAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LoanPortfolioAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loan Portfolio [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis" xlink:type="locator" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Portfolio Segment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivablePortfolioSegmentAxis" xlink:to="us-gaap_FinancingReceivablePortfolioSegmentAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Portfolio Segment [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain" xlink:type="locator" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Portfolio Segment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivablePortfolioSegmentDomain" xlink:to="us-gaap_FinancingReceivablePortfolioSegmentDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Portfolio Segment [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialPortfolioSegmentMember" xlink:type="locator" xlink:label="us-gaap_CommercialPortfolioSegmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommercialPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommercialPortfolioSegmentMember" xlink:to="us-gaap_CommercialPortfolioSegmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommercialPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConsumerPortfolioSegmentMember" xlink:type="locator" xlink:label="us-gaap_ConsumerPortfolioSegmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConsumerPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer Loans [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConsumerPortfolioSegmentMember" xlink:to="us-gaap_ConsumerPortfolioSegmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConsumerPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross loans, total amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:to="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Gross Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableDeferredIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deferred loan (fees) costs, net</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Allowance for loan losses</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableNetReportedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loans, net</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfLoanOnCommercialLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial, Percent</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfLoanOnCommercialLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Loan On Commercial Loan Portfolio</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfLoanOnConsumerLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer, Percent</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfLoanOnConsumerLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Loan On Consumer Loan Portfolio</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfLoanAggregateLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gross loans, Total Percent</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfLoanAggregateLoanPortfolio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Loan Aggregate Loan Portfolio</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInFinanceReceivables" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInFinanceReceivables" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInFinanceReceivables_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase (Decrease) in total gross loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInFinanceReceivables" xlink:to="us-gaap_IncreaseDecreaseInFinanceReceivables_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInFinanceReceivables_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Finance Receivables</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_LoanCollateralized" xlink:type="locator" xlink:label="bkgm_LoanCollateralized" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LoanCollateralized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loan collateralized.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_LoanCollateralized" xlink:to="bkgm_LoanCollateralized_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LoanCollateralized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of Loan collateralized</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LoanCollateralized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loan Collateralized</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AllLoansAndCreditCardsDelinquent" xlink:type="locator" xlink:label="bkgm_AllLoansAndCreditCardsDelinquent" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AllLoansAndCreditCardsDelinquent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">All loans and credit cards delinquent.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AllLoansAndCreditCardsDelinquent" xlink:to="bkgm_AllLoansAndCreditCardsDelinquent_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_RealEstateLoansDelinquent" xlink:type="locator" xlink:label="bkgm_RealEstateLoansDelinquent" />
    <link:label xml:lang="en-US" xlink:label="bkgm_RealEstateLoansDelinquent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Real estate loans delinquent.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_RealEstateLoansDelinquent" xlink:to="bkgm_RealEstateLoansDelinquent_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_DelinquentRealEstateLoansForeclosureCompletionPeriod" xlink:type="locator" xlink:label="bkgm_DelinquentRealEstateLoansForeclosureCompletionPeriod" />
    <link:label xml:lang="en-US" xlink:label="bkgm_DelinquentRealEstateLoansForeclosureCompletionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Delinquent real estate loans foreclosure completion period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_DelinquentRealEstateLoansForeclosureCompletionPeriod" xlink:to="bkgm_DelinquentRealEstateLoansForeclosureCompletionPeriod_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PeriodForLoansDelinquentUnderFormulaCategory" xlink:type="locator" xlink:label="bkgm_PeriodForLoansDelinquentUnderFormulaCategory" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PeriodForLoansDelinquentUnderFormulaCategory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Period for loans delinquent under formula category.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PeriodForLoansDelinquentUnderFormulaCategory" xlink:to="bkgm_PeriodForLoansDelinquentUnderFormulaCategory_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AllLoansAndCreditCardsDelinquent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">All loans and credit cards delinquent</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AllLoansAndCreditCardsDelinquent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">All Loans And Credit Cards Delinquent</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RealEstateLoansDelinquent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Real estate loans delinquent</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RealEstateLoansDelinquent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Real Estate Loans Delinquent</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_DelinquentRealEstateLoansForeclosureCompletionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Delinquent real estate loans foreclosure completion period</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_DelinquentRealEstateLoansForeclosureCompletionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Delinquent Real Estate Loans Foreclosure Completion Period</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PeriodForLoansDelinquentUnderFormulaCategory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Period for loans delinquent under formula category</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PeriodForLoansDelinquentUnderFormulaCategory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Period For Loans Delinquent Under Formula Category</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts" xlink:type="locator" xlink:label="bkgm_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for loan and lease loss, recovery of (provision for) bad debts.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts" xlink:to="bkgm_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk" xlink:type="locator" xlink:label="bkgm_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Provision For Loan And Lease Losses excluding Reserve For Off-Balance Sheet Risk.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk" xlink:to="bkgm_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_RecordedInvestmentInLoansAndLeasesAbstract" xlink:type="locator" xlink:label="bkgm_RecordedInvestmentInLoansAndLeasesAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgm_RecordedInvestmentInLoansAndLeasesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Recorded investment in loans and leases.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_RecordedInvestmentInLoansAndLeasesAbstract" xlink:to="bkgm_RecordedInvestmentInLoansAndLeasesAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Financing Receivable Allowance For Credit Losses [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable" xlink:to="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Financing Receivable Allowance For Credit Losses [Table]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ResidentialMortgageAndHomeEquityMember" xlink:type="locator" xlink:label="bkgm_ResidentialMortgageAndHomeEquityMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ResidentialMortgageAndHomeEquityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Residential mortgage and home equity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ResidentialMortgageAndHomeEquityMember" xlink:to="bkgm_ResidentialMortgageAndHomeEquityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ResidentialMortgageAndHomeEquityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Residential Mortgage And Home Equity [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ResidentialMortgageAndHomeEquityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Residential Mortgage And Home Equity [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ConsumerPortfolioOtherThanResidentialMortgagesMember" xlink:type="locator" xlink:label="bkgm_ConsumerPortfolioOtherThanResidentialMortgagesMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ConsumerPortfolioOtherThanResidentialMortgagesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Consumer portfolio, other than residential mortgages.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ConsumerPortfolioOtherThanResidentialMortgagesMember" xlink:to="bkgm_ConsumerPortfolioOtherThanResidentialMortgagesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ConsumerPortfolioOtherThanResidentialMortgagesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ConsumerPortfolioOtherThanResidentialMortgagesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Portfolio Other Than Residential Mortgages [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Allowance For Credit Losses [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems" xlink:to="us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Allowance For Credit Losses [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance for loan losses:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward" xlink:to="us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Allowance For Credit Losses Roll Forward</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs" xlink:type="locator" xlink:label="us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Charge-offs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs" xlink:to="us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Loan And Lease Losses Write Offs</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recoveries</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Loan And Lease Loss Recovery Of Provision For Bad Debts</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Provision</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Provision For Loan And Lease Losses Excluding Reserve For Off Balance Sheet Risk</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossAdditionalInformationAbstract" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossAdditionalInformationAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossAdditionalInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance balance at end of period related to:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableAllowanceForCreditLossAdditionalInformationAbstract" xlink:to="us-gaap_FinancingReceivableAllowanceForCreditLossAdditionalInformationAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossAdditionalInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Allowance For Credit Loss Additional Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans individually evaluated for impairment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1" xlink:to="us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans collectively evaluated for impairment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment" xlink:to="us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RecordedInvestmentInLoansAndLeasesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loan balances at end of period:</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RecordedInvestmentInLoansAndLeasesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Recorded Investment In Loans And Leases [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans individually evaluated for impairment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment" xlink:to="us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Individually Evaluated For Impairment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans collectively evaluated for impairment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment" xlink:to="us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Collectively Evaluated For Impairment</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_NumberOfBorrowersInBankruptcyFilingOfCommercialLoan" xlink:type="locator" xlink:label="bkgm_NumberOfBorrowersInBankruptcyFilingOfCommercialLoan" />
    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfBorrowersInBankruptcyFilingOfCommercialLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of borrowers in bankruptcy filing of commercial loan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_NumberOfBorrowersInBankruptcyFilingOfCommercialLoan" xlink:to="bkgm_NumberOfBorrowersInBankruptcyFilingOfCommercialLoan_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AllowanceForLoanAndLeaseLossesSpecificReserve" xlink:type="locator" xlink:label="bkgm_AllowanceForLoanAndLeaseLossesSpecificReserve" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AllowanceForLoanAndLeaseLossesSpecificReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for loan and lease losses, specific reserve.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AllowanceForLoanAndLeaseLossesSpecificReserve" xlink:to="bkgm_AllowanceForLoanAndLeaseLossesSpecificReserve_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease" xlink:type="locator" xlink:label="us-gaap_AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in allowance for loan losses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease" xlink:to="us-gaap_AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Loan And Lease Losses Period Increase Decrease</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfBorrowersInBankruptcyFilingOfCommercialLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of borrowers in bankruptcy filing of commercial loan</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfBorrowersInBankruptcyFilingOfCommercialLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Borrowers In Bankruptcy Filing Of Commercial Loan</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AllowanceForLoanAndLeaseLossesSpecificReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Specific reserve</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AllowanceForLoanAndLeaseLossesSpecificReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Loan And Lease Losses Specific Reserve</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLosses" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reserve for allowance for loan losses at period end</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:to="us-gaap_FinancingReceivableAllowanceForCreditLosses_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Allowance For Credit Losses</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AllowanceForLoansAndLeaseLossesProvisionForLossNetAbstract" xlink:type="locator" xlink:label="bkgm_AllowanceForLoansAndLeaseLossesProvisionForLossNetAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AllowanceForLoansAndLeaseLossesProvisionForLossNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loans held for sale loans and allowance for loan losses.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AllowanceForLoansAndLeaseLossesProvisionForLossNetAbstract" xlink:to="bkgm_AllowanceForLoansAndLeaseLossesProvisionForLossNetAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AllowanceForLoansAndLeaseLossesProvisionForLossNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Loans And Lease Losses Provision For Loss Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivablesPastDueTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivablesPastDueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Financing Receivables Past Due [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivablesPastDueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Financing Receivables Past Due [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis" xlink:type="locator" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Asset, Period Past Due</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables Period Past Due [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain" xlink:type="locator" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Asset, Period Past Due</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesPeriodPastDueDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables Period Past Due [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivables30To59DaysPastDueMember" xlink:type="locator" xlink:label="us-gaap_FinancingReceivables30To59DaysPastDueMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivables30To59DaysPastDueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">30-59 Days Past Due [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivables30To59DaysPastDueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables30 To59 Days Past Due [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivables60To89DaysPastDueMember" xlink:type="locator" xlink:label="us-gaap_FinancingReceivables60To89DaysPastDueMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivables60To89DaysPastDueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">60-89 Days Past Due [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivables60To89DaysPastDueMember" xlink:to="us-gaap_FinancingReceivables60To89DaysPastDueMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivables60To89DaysPastDueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables60 To89 Days Past Due [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember" xlink:type="locator" xlink:label="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing receivables equal to greater than 90 days past due non-accrual.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember" xlink:to="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">90 Days and Greater Non-Accrual [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables Equal To Greater Than90 Days Past Due Non Accrual [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember" xlink:type="locator" xlink:label="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing receivables equal to greater than 90 days past due still accruing.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember" xlink:to="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">90 Days and Greater Still Accruing [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables Equal To Greater Than90 Days Past Due Still Accruing [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Recorded Investment Past Due [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Past Due [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDue" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Past Due</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentPastDue" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentPastDue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentPastDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Past Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentCurrent" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentCurrent" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Current</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Loans Outstanding</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AccrualOfInterestPaymentsOnLoan" xlink:type="locator" xlink:label="bkgm_AccrualOfInterestPaymentsOnLoan" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AccrualOfInterestPaymentsOnLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrual of interest payments on loan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AccrualOfInterestPaymentsOnLoan" xlink:to="bkgm_AccrualOfInterestPaymentsOnLoan_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AccrualOfInterestPaymentsOnLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrual of interest payments on loan</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AccrualOfInterestPaymentsOnLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrual Of Interest Payments On Loan</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-accrual loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Nonaccrual Status</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:to="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Recorded Investment [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment [Line Items]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToReclassification" xlink:type="locator" xlink:label="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToReclassification" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToReclassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Transfer of finance receivables from special mention to category due to reclassification.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToReclassification" xlink:to="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToReclassification_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToReclassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfer of loan due to reclassification</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToReclassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transfer Of Finance Receivables From Special Mention To Category Due To Reclassification</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FinanceReceivableChangeInCategoryRelationship" xlink:type="locator" xlink:label="bkgm_FinanceReceivableChangeInCategoryRelationship" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FinanceReceivableChangeInCategoryRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Finance receivable change in category relationship.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_FinanceReceivableChangeInCategoryRelationship" xlink:to="bkgm_FinanceReceivableChangeInCategoryRelationship_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToDowngradeOfLoanRelationship" xlink:type="locator" xlink:label="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToDowngradeOfLoanRelationship" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToDowngradeOfLoanRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Transfer of finance receivables from special mention to category due to downgrade of loan relationship.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToDowngradeOfLoanRelationship" xlink:to="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToDowngradeOfLoanRelationship_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FinanceReceivablePayOffDueToChangeInCategoryRelationship" xlink:type="locator" xlink:label="bkgm_FinanceReceivablePayOffDueToChangeInCategoryRelationship" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FinanceReceivablePayOffDueToChangeInCategoryRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Finance receivable pay off due to change in category relationship.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_FinanceReceivablePayOffDueToChangeInCategoryRelationship" xlink:to="bkgm_FinanceReceivablePayOffDueToChangeInCategoryRelationship_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FinanceReceivableChangeInCategoryRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in loan relationship</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinanceReceivableChangeInCategoryRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Receivable Change In Category Relationship</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinanceReceivablePayOffDueToChangeInCategoryRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pay off due to change in category relationship</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinanceReceivablePayOffDueToChangeInCategoryRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Receivable Pay Off Due To Change In Category Relationship</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToDowngradeOfLoanRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Due of various loans</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToDowngradeOfLoanRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transfer Of Finance Receivables From Special Mention To Category Due To Downgrade Of Loan Relationship</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_TransferOfFinanceReceivablesFromSubstandardCategoryDueToUpGradation" xlink:type="locator" xlink:label="bkgm_TransferOfFinanceReceivablesFromSubstandardCategoryDueToUpGradation" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSubstandardCategoryDueToUpGradation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Transfer of finance receivables from substandard category due to up gradation.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_TransferOfFinanceReceivablesFromSubstandardCategoryDueToUpGradation" xlink:to="bkgm_TransferOfFinanceReceivablesFromSubstandardCategoryDueToUpGradation_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_TransferOfFinanceReceivablesFromSubstandardToCategoryDueToDowngradeOfLoanRelationship" xlink:type="locator" xlink:label="bkgm_TransferOfFinanceReceivablesFromSubstandardToCategoryDueToDowngradeOfLoanRelationship" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSubstandardToCategoryDueToDowngradeOfLoanRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Transfer of finance receivables from substandard to category due to downgrade of loan relationship.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_TransferOfFinanceReceivablesFromSubstandardToCategoryDueToDowngradeOfLoanRelationship" xlink:to="bkgm_TransferOfFinanceReceivablesFromSubstandardToCategoryDueToDowngradeOfLoanRelationship_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSubstandardToCategoryDueToDowngradeOfLoanRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfer of loan due to grade change</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSubstandardToCategoryDueToDowngradeOfLoanRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transfer Of Finance Receivables From Substandard To Category Due To Downgrade Of Loan Relationship</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSubstandardCategoryDueToUpGradation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfer of loan due to grade change</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromSubstandardCategoryDueToUpGradation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transfer Of Finance Receivables From Substandard Category Due To Up Gradation</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification" xlink:type="locator" xlink:label="bkgm_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Transfer of finance receivables from doubtful category due to reclassification.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification" xlink:to="bkgm_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross loans, total amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transfer Of Finance Receivables From Doubtful Category Due To Reclassification</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_TroubledDebtRestructuringsAbstract" xlink:type="locator" xlink:label="bkgm_TroubledDebtRestructuringsAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TroubledDebtRestructuringsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Troubled debt restructurings.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_TroubledDebtRestructuringsAbstract" xlink:to="bkgm_TroubledDebtRestructuringsAbstract_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring" xlink:type="locator" xlink:label="bkgm_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing receivables impaired non-accruing troubled debt restructuring.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring" xlink:to="bkgm_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring" xlink:type="locator" xlink:label="bkgm_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing receivables impaired accruing troubled debt restructuring.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring" xlink:to="bkgm_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans" xlink:type="locator" xlink:label="bkgm_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Impaired loans less than 90 days delinquent and included in total impaired loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans" xlink:to="bkgm_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TroubledDebtRestructuringsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructured loans:</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TroubledDebtRestructuringsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Troubled Debt Restructurings [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-accruing restructured loans</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables Impaired Non Accruing Troubled Debt Restructuring</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accruing restructured loans</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables Impaired Accruing Troubled Debt Restructuring</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableModificationsRecordedInvestment" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total restructured loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsRecordedInvestment" xlink:to="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other impaired loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest" xlink:to="us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairedFinancingReceivableRecordedInvestment" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivableRecordedInvestment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total impaired loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivableRecordedInvestment" xlink:to="us-gaap_ImpairedFinancingReceivableRecordedInvestment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable Recorded Investment</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impaired loans less than 90 days delinquent and included in total impaired loans</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Loans Less Than Ninety Days Delinquent And Included In Impaired Loans</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeExpenseAccrualMethod" xlink:type="locator" xlink:label="bkgm_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeExpenseAccrualMethod" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeExpenseAccrualMethod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Impaired financing receivable with no related allowance interest income/expense accrual method.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeExpenseAccrualMethod" xlink:to="bkgm_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeExpenseAccrualMethod_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfImpairedFinancingReceivableTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfImpairedFinancingReceivableTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfImpairedFinancingReceivableTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Impaired Financing Receivable [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfImpairedFinancingReceivableTable" xlink:to="us-gaap_ScheduleOfImpairedFinancingReceivableTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfImpairedFinancingReceivableTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Impaired Financing Receivable [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember" xlink:type="locator" xlink:label="us-gaap_CommercialRealEstatePortfolioSegmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommercialRealEstatePortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial Real Estate Portfolio Segment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommercialRealEstatePortfolioSegmentMember" xlink:to="us-gaap_CommercialRealEstatePortfolioSegmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommercialRealEstatePortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Real Estate Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableImpairedLineItems" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableImpairedLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableImpairedLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Impaired [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableImpairedLineItems" xlink:to="us-gaap_FinancingReceivableImpairedLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableImpairedLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Impaired [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total impaired loans with no related allowance, Recorded Investment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment" xlink:to="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable With No Related Allowance Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total impaired loans with no related allowance, Unpaid Principal Balance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance" xlink:to="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total impaired loans with no related allowance, Average Recorded Investment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment" xlink:to="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable With No Related Allowance Average Recorded Investment</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeExpenseAccrualMethod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total impaired loans with no related allowance, Interest Income Recognized</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeExpenseAccrualMethod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable With No Related Allowance Interest Income Expense Accrual Method</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod" xlink:type="locator" xlink:label="bkgm_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Impaired financing receivable with related allowance interest income expense and unearned discount accrual method.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod" xlink:to="bkgm_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total impaired loans with a related allowance recorded, Recorded Investment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment" xlink:to="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable With Related Allowance Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total impaired loans with a related allowance recorded, Unpaid Principal Balance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance" xlink:to="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable With Related Allowance Unpaid Principal Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total impaired loans with a related allowance recorded, Average Recorded Investment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment" xlink:to="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable With Related Allowance Average Recorded Investment</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total impaired loans with a related allowance recorded, Interest Income Recognized</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable With Related Allowance Interest Income Expense And Unearned Discount Accrual Method</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Troubled Debt Restructurings (TDRs)</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FinancingReceivablePrincipalModificationRecordedInvestment" xlink:type="locator" xlink:label="bkgm_FinancingReceivablePrincipalModificationRecordedInvestment" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablePrincipalModificationRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing receivable principal modification recorded investment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_FinancingReceivablePrincipalModificationRecordedInvestment" xlink:to="bkgm_FinancingReceivablePrincipalModificationRecordedInvestment_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Financing Receivable Troubled Debt Restructurings [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable" xlink:to="us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Financing Receivable Troubled Debt Restructurings [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentPerformanceStatusAxis" xlink:type="locator" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instrument Performance Status</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentPerformanceStatusAxis" xlink:to="us-gaap_FinancialInstrumentPerformanceStatusAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument Performance Status [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentPerformanceStatusDomain" xlink:type="locator" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instrument Performance Status</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentPerformanceStatusDomain" xlink:to="us-gaap_FinancialInstrumentPerformanceStatusDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument Performance Status [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformingFinancingReceivableMember" xlink:type="locator" xlink:label="us-gaap_PerformingFinancingReceivableMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PerformingFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performing [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PerformingFinancingReceivableMember" xlink:to="us-gaap_PerformingFinancingReceivableMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PerformingFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Performing Financing Receivable [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonperformingFinancingReceivableMember" xlink:type="locator" xlink:label="us-gaap_NonperformingFinancingReceivableMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NonperformingFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nonperforming [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonperformingFinancingReceivableMember" xlink:to="us-gaap_NonperformingFinancingReceivableMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NonperformingFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Nonperforming Financing Receivable [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableModificationsLineItems" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Modifications [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsLineItems" xlink:to="us-gaap_FinancingReceivableModificationsLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableModificationsNumberOfContracts2" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsNumberOfContracts2" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsNumberOfContracts2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsNumberOfContracts2" xlink:to="us-gaap_FinancingReceivableModificationsNumberOfContracts2_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsNumberOfContracts2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications Number Of Contracts2</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-Modification Outstanding Recorded Investment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2" xlink:to="us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications Pre Modification Recorded Investment2</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablePrincipalModificationRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal Modifications</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FinancingReceivablePrincipalModificationRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Principal Modification Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Post-Modification Outstanding Recorded Investment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2" xlink:to="us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications Post Modification Recorded Investment2</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Property Plant And Equipment [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:to="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Property Plant And Equipment [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BuildingMember" xlink:type="locator" xlink:label="us-gaap_BuildingMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Buildings [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BuildingMember" xlink:to="us-gaap_BuildingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Building [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AutomobilesAndMobileFacilitiesMember" xlink:type="locator" xlink:label="bkgm_AutomobilesAndMobileFacilitiesMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AutomobilesAndMobileFacilitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Automobiles and mobile facilities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AutomobilesAndMobileFacilitiesMember" xlink:to="bkgm_AutomobilesAndMobileFacilitiesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AutomobilesAndMobileFacilitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Automobiles and Mobile Facilities [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AutomobilesAndMobileFacilitiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Automobiles And Mobile Facilities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:type="locator" xlink:label="us-gaap_LeaseholdImprovementsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leasehold Improvements [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseholdImprovementsMember" xlink:to="us-gaap_LeaseholdImprovementsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Leasehold Improvements [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PropertyPlantAndEquipmentOtherThanConstructionInProgressMember" xlink:type="locator" xlink:label="bkgm_PropertyPlantAndEquipmentOtherThanConstructionInProgressMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PropertyPlantAndEquipmentOtherThanConstructionInProgressMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Property plant and equipment other than construction in progress.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PropertyPlantAndEquipmentOtherThanConstructionInProgressMember" xlink:to="bkgm_PropertyPlantAndEquipmentOtherThanConstructionInProgressMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PropertyPlantAndEquipmentOtherThanConstructionInProgressMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property Plant and Equipment Other than Construction In Progress [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PropertyPlantAndEquipmentOtherThanConstructionInProgressMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Other Than Construction In Progress [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConstructionInProgressMember" xlink:type="locator" xlink:label="us-gaap_ConstructionInProgressMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConstructionInProgressMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction in Progress [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConstructionInProgressMember" xlink:to="us-gaap_ConstructionInProgressMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConstructionInProgressMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Construction In Progress [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated Depreciation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Depreciation Depletion And Amortization Property Plant And Equipment</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Book Value</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Depreciation expense</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PrepaidIncomeTaxes" xlink:type="locator" xlink:label="bkgm_PrepaidIncomeTaxes" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PrepaidIncomeTaxes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepaid income taxes.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PrepaidIncomeTaxes" xlink:to="bkgm_PrepaidIncomeTaxes_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_MortgageServicingRights" xlink:type="locator" xlink:label="bkgm_MortgageServicingRights" />
    <link:label xml:lang="en-US" xlink:label="bkgm_MortgageServicingRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Mortgage servicing rights.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_MortgageServicingRights" xlink:to="bkgm_MortgageServicingRights_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AssetsOther" xlink:type="locator" xlink:label="bkgm_AssetsOther" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AssetsOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Assets other.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AssetsOther" xlink:to="bkgm_AssetsOther_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BankOwnedLifeInsurance" xlink:type="locator" xlink:label="us-gaap_BankOwnedLifeInsurance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BankOwnedLifeInsurance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank Owned Life Insurance</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_BankOwnedLifeInsurance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bank Owned Life Insurance</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PrepaidIncomeTaxes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid income tax</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PrepaidIncomeTaxes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Income Taxes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:type="locator" xlink:label="us-gaap_PrepaidExpenseCurrentAndNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseCurrentAndNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:to="us-gaap_PrepaidExpenseCurrentAndNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseCurrentAndNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense Current And Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherRealEstate" xlink:type="locator" xlink:label="us-gaap_OtherRealEstate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other real estate owned, net (Note 9)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherRealEstate" xlink:to="us-gaap_OtherRealEstate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Real Estate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax asset, net (Note 13)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:to="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Liabilities Net</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MortgageServicingRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mortgage servicing rights (Note 19)</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MortgageServicingRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Mortgage Servicing Rights</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:type="locator" xlink:label="us-gaap_Goodwill" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Goodwill" xlink:to="us-gaap_Goodwill_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAsset" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseRightOfUseAsset" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right-of-use asset (Note 20)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseRightOfUseAsset" xlink:to="us-gaap_FinanceLeaseRightOfUseAsset_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Right Of Use Asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNet" xlink:type="locator" xlink:label="us-gaap_AccountsReceivableNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableNet" xlink:to="us-gaap_AccountsReceivableNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable Net</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AssetsOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AssetsOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Other</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total other assets</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AggregateOtherRealEstatePeriodIncreaseDecreaseExcludingValuationAdjustmentMonetary" xlink:type="locator" xlink:label="bkgm_AggregateOtherRealEstatePeriodIncreaseDecreaseExcludingValuationAdjustmentMonetary" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AggregateOtherRealEstatePeriodIncreaseDecreaseExcludingValuationAdjustmentMonetary_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Aggregate other real estate period increase decrease excluding valuation adjustment monetary.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AggregateOtherRealEstatePeriodIncreaseDecreaseExcludingValuationAdjustmentMonetary" xlink:to="bkgm_AggregateOtherRealEstatePeriodIncreaseDecreaseExcludingValuationAdjustmentMonetary_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_LossesOnWriteDownsAndLossOnSaleNet" xlink:type="locator" xlink:label="bkgm_LossesOnWriteDownsAndLossOnSaleNet" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LossesOnWriteDownsAndLossOnSaleNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Losses on write-downs and loss on sale net.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_LossesOnWriteDownsAndLossOnSaleNet" xlink:to="bkgm_LossesOnWriteDownsAndLossOnSaleNet_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherRealEstateRollForward" xlink:type="locator" xlink:label="us-gaap_OtherRealEstateRollForward" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstateRollForward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Real Estate [Roll Forward]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherRealEstateRollForward" xlink:to="us-gaap_OtherRealEstateRollForward_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstateRollForward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Real Estate Roll Forward</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Other real estate, Beginning Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherRealEstateAdditions" xlink:type="locator" xlink:label="us-gaap_OtherRealEstateAdditions" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstateAdditions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Additions</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherRealEstateAdditions" xlink:to="us-gaap_OtherRealEstateAdditions_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstateAdditions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Real Estate Additions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherRealEstateDisposals" xlink:type="locator" xlink:label="us-gaap_OtherRealEstateDisposals" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstateDisposals_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Sales</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherRealEstateDisposals" xlink:to="us-gaap_OtherRealEstateDisposals_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstateDisposals_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Real Estate Disposals</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AggregateOtherRealEstatePeriodIncreaseDecreaseExcludingValuationAdjustmentMonetary_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AggregateOtherRealEstatePeriodIncreaseDecreaseExcludingValuationAdjustmentMonetary_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Other Real Estate Period Increase Decrease Excluding Valuation Adjustment Monetary</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LossesOnWriteDownsAndLossOnSaleNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Write-downs and loss on sales, net</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LossesOnWriteDownsAndLossOnSaleNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Losses On Write Downs And Loss On Sale Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherRealEstateValuationAdjustments" xlink:type="locator" xlink:label="us-gaap_OtherRealEstateValuationAdjustments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstateValuationAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in valuation allowances</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherRealEstateValuationAdjustments" xlink:to="us-gaap_OtherRealEstateValuationAdjustments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstateValuationAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Real Estate Valuation Adjustments</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Other Real Estate, Ending Balance</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_TimeDepositsLessThenFDICInsuranceLimit" xlink:type="locator" xlink:label="bkgm_TimeDepositsLessThenFDICInsuranceLimit" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TimeDepositsLessThenFDICInsuranceLimit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Time deposits less then FDIC insurance limit.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_TimeDepositsLessThenFDICInsuranceLimit" xlink:to="bkgm_TimeDepositsLessThenFDICInsuranceLimit_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_InterestBearingDepositOther" xlink:type="locator" xlink:label="bkgm_InterestBearingDepositOther" />
    <link:label xml:lang="en-US" xlink:label="bkgm_InterestBearingDepositOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest bearing deposit other.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_InterestBearingDepositOther" xlink:to="bkgm_InterestBearingDepositOther_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestBearingDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Non-interest bearing deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract" xlink:type="locator" xlink:label="us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest bearing deposits:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract" xlink:to="us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Deposit Liabilities By Component [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DemandDepositAccounts" xlink:type="locator" xlink:label="us-gaap_DemandDepositAccounts" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DemandDepositAccounts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Demand deposits</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DemandDepositAccounts" xlink:to="us-gaap_DemandDepositAccounts_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DemandDepositAccounts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Demand Deposit Accounts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepositsSavingsDeposits" xlink:type="locator" xlink:label="us-gaap_DepositsSavingsDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsSavingsDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regular savings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositsSavingsDeposits" xlink:to="us-gaap_DepositsSavingsDeposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsSavingsDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposits Savings Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TimeDepositsAbstract" xlink:type="locator" xlink:label="us-gaap_TimeDepositsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Time deposits:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositsAbstract" xlink:to="us-gaap_TimeDepositsAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposits [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit" xlink:type="locator" xlink:label="us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">$250,000 or more</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit" xlink:to="us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposits At Or Above F D I C Insurance Limit</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TimeDepositsLessThenFDICInsuranceLimit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less than $250,000</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TimeDepositsLessThenFDICInsuranceLimit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposits Less Then F D I C Insurance Limit</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_InterestBearingDepositOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other interest bearing deposits</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_InterestBearingDepositOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Deposit Other</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total interest bearing deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TimeDepositMaturitiesYearOne" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesYearOne" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearOne_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesYearOne" xlink:to="us-gaap_TimeDepositMaturitiesYearOne_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearOne_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Year One</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TimeDepositMaturitiesYearTwo" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesYearTwo" xlink:to="us-gaap_TimeDepositMaturitiesYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TimeDepositMaturitiesYearThree" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesYearThree" xlink:to="us-gaap_TimeDepositMaturitiesYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TimeDepositMaturitiesYearFour" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesYearFour" xlink:to="us-gaap_TimeDepositMaturitiesYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TimeDepositMaturitiesAfterYearFive" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesAfterYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024 and thereafter</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesAfterYearFive" xlink:to="us-gaap_TimeDepositMaturitiesAfterYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities After Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TimeDeposits" xlink:type="locator" xlink:label="us-gaap_TimeDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Time deposits, Total</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDeposits" xlink:to="us-gaap_TimeDeposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposits</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FederalReserveMargin" xlink:type="locator" xlink:label="bkgm_FederalReserveMargin" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FederalReserveMargin_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Federal reserve margin.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_FederalReserveMargin" xlink:to="bkgm_FederalReserveMargin_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_DebtInstrumentBorrowingCapacityAmount" xlink:type="locator" xlink:label="bkgm_DebtInstrumentBorrowingCapacityAmount" />
    <link:label xml:lang="en-US" xlink:label="bkgm_DebtInstrumentBorrowingCapacityAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument borrowing capacity amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_DebtInstrumentBorrowingCapacityAmount" xlink:to="bkgm_DebtInstrumentBorrowingCapacityAmount_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_ShortTermDebtTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeAxis" xlink:to="us-gaap_ShortTermDebtTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Debt Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_ShortTermDebtTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeDomain" xlink:to="us-gaap_ShortTermDebtTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Debt Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FederalReserveBankAdvancesMember" xlink:type="locator" xlink:label="us-gaap_FederalReserveBankAdvancesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalReserveBankAdvancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">FRB Discount Window [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalReserveBankAdvancesMember" xlink:to="us-gaap_FederalReserveBankAdvancesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalReserveBankAdvancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Reserve Bank Advances [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Investments" xlink:type="locator" xlink:label="us-gaap_Investments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Investments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment securities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Investments" xlink:to="us-gaap_Investments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Investments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investments</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_DebtInstrumentBorrowingCapacityAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Borrowing capacity</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_DebtInstrumentBorrowingCapacityAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Borrowing Capacity Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FederalReserveMargin_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal reserve margin</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FederalReserveMargin_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Reserve Margin</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtDefaultShorttermDebtAmount" xlink:type="locator" xlink:label="us-gaap_DebtDefaultShorttermDebtAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtDefaultShorttermDebtAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding borrowings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDefaultShorttermDebtAmount" xlink:to="us-gaap_DebtDefaultShorttermDebtAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtDefaultShorttermDebtAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Default Shortterm Debt Amount</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_MaximumBorrowingCapacityRepresentedAsPercentageOfAssets" xlink:type="locator" xlink:label="bkgm_MaximumBorrowingCapacityRepresentedAsPercentageOfAssets" />
    <link:label xml:lang="en-US" xlink:label="bkgm_MaximumBorrowingCapacityRepresentedAsPercentageOfAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum borrowing capacity represented as percentage of assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_MaximumBorrowingCapacityRepresentedAsPercentageOfAssets" xlink:to="bkgm_MaximumBorrowingCapacityRepresentedAsPercentageOfAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_MaximumBorrowingCapacityRepresentedAsPercentageOfAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum borrowing capacity represented as percentage of assets</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MaximumBorrowingCapacityRepresentedAsPercentageOfAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Borrowing Capacity Represented As Percentage Of Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesLongTerm" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesLongTerm" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesLongTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding advances against credit line</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesLongTerm" xlink:to="us-gaap_FederalHomeLoanBankAdvancesLongTerm_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesLongTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Long Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Funds lines of credit available</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds" xlink:to="us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding borrowings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch" xlink:to="us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Branch Of F H L B Bank Amount Of Advances By Branch</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_LoansAndLeasesReceivableCommitmentsUndisbursedCommitments" xlink:type="locator" xlink:label="bkgm_LoansAndLeasesReceivableCommitmentsUndisbursedCommitments" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LoansAndLeasesReceivableCommitmentsUndisbursedCommitments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loans and leases receivable commitments undisbursed commitments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_LoansAndLeasesReceivableCommitmentsUndisbursedCommitments" xlink:to="bkgm_LoansAndLeasesReceivableCommitmentsUndisbursedCommitments_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_RevolvingAccountsReceivableRelatedParties" xlink:type="locator" xlink:label="bkgm_RevolvingAccountsReceivableRelatedParties" />
    <link:label xml:lang="en-US" xlink:label="bkgm_RevolvingAccountsReceivableRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Revolving accounts receivable related parties.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_RevolvingAccountsReceivableRelatedParties" xlink:to="bkgm_RevolvingAccountsReceivableRelatedParties_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_AggregateTermLoansAndRevolvingAccountsReceivableRelatedParties" xlink:type="locator" xlink:label="bkgm_AggregateTermLoansAndRevolvingAccountsReceivableRelatedParties" />
    <link:label xml:lang="en-US" xlink:label="bkgm_AggregateTermLoansAndRevolvingAccountsReceivableRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Aggregate term loans and revolving accounts receivable related parties.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_AggregateTermLoansAndRevolvingAccountsReceivableRelatedParties" xlink:to="bkgm_AggregateTermLoansAndRevolvingAccountsReceivableRelatedParties_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Related Party Transactions By Related Party [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Related Party Transactions By Related Party [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions By Related Party [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:type="locator" xlink:label="us-gaap_RelatedPartyDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ManagementMember" xlink:type="locator" xlink:label="srt_ManagementMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ManagementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Management [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ManagementMember" xlink:to="srt_ManagementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ManagementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Management [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansAndLeasesReceivableRelatedParties" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedParties" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableRelatedParties" xlink:to="us-gaap_LoansAndLeasesReceivableRelatedParties_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Related Parties</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LoansAndLeasesReceivableCommitmentsUndisbursedCommitments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Undisbursed commitments</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LoansAndLeasesReceivableCommitmentsUndisbursedCommitments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Commitments Undisbursed Commitments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New loans granted</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions" xlink:to="us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Related Parties Additions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Principal repayments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds" xlink:to="us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Related Parties Proceeds</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance of term loans</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RevolvingAccountsReceivableRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Year-end balance of revolving accounts</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RevolvingAccountsReceivableRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revolving Accounts Receivable Related Parties</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AggregateTermLoansAndRevolvingAccountsReceivableRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total term loans and revolving accounts</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_AggregateTermLoansAndRevolvingAccountsReceivableRelatedParties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Term Loans And Revolving Accounts Receivable Related Parties</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_NumberOfEntitiesWhichProvideFacilities" xlink:type="locator" xlink:label="bkgm_NumberOfEntitiesWhichProvideFacilities" />
    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfEntitiesWhichProvideFacilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of entities which provide facilities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_NumberOfEntitiesWhichProvideFacilities" xlink:to="bkgm_NumberOfEntitiesWhichProvideFacilities_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_NumberOfDirectors" xlink:type="locator" xlink:label="bkgm_NumberOfDirectors" />
    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfDirectors_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of directors.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_NumberOfDirectors" xlink:to="bkgm_NumberOfDirectors_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfEntitiesWhichProvideFacilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of entities which provide facilities</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfEntitiesWhichProvideFacilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Entities Which Provide Facilities</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfDirectors_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Directors</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:to="us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_lbl" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Government of Guam tax expense (benefit):</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current Federal Tax Expense Benefit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_DeferredFederalIncomeTaxExpenseBenefit" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations" xlink:type="locator" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations" />
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    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_EffectiveIncomeTaxRateReconciliationPermanentDifferences" xlink:type="locator" xlink:label="bkgm_EffectiveIncomeTaxRateReconciliationPermanentDifferences" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_EffectiveIncomeTaxRateReconciliationPermanentDifferences" xlink:to="bkgm_EffectiveIncomeTaxRateReconciliationPermanentDifferences_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:type="locator" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Income Tax Expense Benefit Continuing Operations [Abstract]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statutory Guam income tax rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" />
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    <link:label xml:lang="en-US" xlink:label="bkgm_EffectiveIncomeTaxRateReconciliationPermanentDifferences_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation Permanent Differences</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit" />
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    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_DeferredIncomeTaxesDeferredLoanOriginationFees" xlink:type="locator" xlink:label="bkgm_DeferredIncomeTaxesDeferredLoanOriginationFees" />
    <link:label xml:lang="en-US" xlink:label="bkgm_DeferredIncomeTaxesDeferredLoanOriginationFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred income taxes deferred loan origination fees.</link:label>
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    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_DeferredIncomeTaxesLeaseLiability" xlink:type="locator" xlink:label="bkgm_DeferredIncomeTaxesLeaseLiability" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="locator" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Name Of Transaction [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockMember" xlink:type="locator" xlink:label="us-gaap_EmployeeStockMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2011 Employee Stock Purchase Plan [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeStockMember" xlink:to="us-gaap_EmployeeStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Arrangement by Share-based Payment Award [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employees right to purchase stock to maximum amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Right To Purchase Stock To Maximum Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employees right to purchase stock to maximum extent</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Right To Purchase Stock To Maximum Shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share purchase price percentage of fair market value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:type="locator" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Compensation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allocated Share Based Compensation Expense</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_DefinedContributionPensionAndOtherPostretirementPlanRequisiteServicePeriod" xlink:type="locator" xlink:label="bkgm_DefinedContributionPensionAndOtherPostretirementPlanRequisiteServicePeriod" />
    <link:label xml:lang="en-US" xlink:label="bkgm_DefinedContributionPensionAndOtherPostretirementPlanRequisiteServicePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Defined contribution pension and other postretirement plan requisite service period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_DefinedContributionPensionAndOtherPostretirementPlanRequisiteServicePeriod" xlink:to="bkgm_DefinedContributionPensionAndOtherPostretirementPlanRequisiteServicePeriod_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_EmployeeDeferralMinimum" xlink:type="locator" xlink:label="bkgm_EmployeeDeferralMinimum" />
    <link:label xml:lang="en-US" xlink:label="bkgm_EmployeeDeferralMinimum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee deferral minimum.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_EmployeeDeferralMinimum" xlink:to="bkgm_EmployeeDeferralMinimum_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_EmployeeDeferralMaximum" xlink:type="locator" xlink:label="bkgm_EmployeeDeferralMaximum" />
    <link:label xml:lang="en-US" xlink:label="bkgm_EmployeeDeferralMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee deferral maximum.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_EmployeeDeferralMaximum" xlink:to="bkgm_EmployeeDeferralMaximum_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_MatchingContributionVestedPeriodOfService" xlink:type="locator" xlink:label="bkgm_MatchingContributionVestedPeriodOfService" />
    <link:label xml:lang="en-US" xlink:label="bkgm_MatchingContributionVestedPeriodOfService_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Matching contribution vested period of service.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_MatchingContributionVestedPeriodOfService" xlink:to="bkgm_MatchingContributionVestedPeriodOfService_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Compensation And Retirement Disclosure [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:to="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Defined Benefit Plans Disclosures [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:to="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Defined Benefit Plans Disclosures [Table]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_SeniorVicePresidentsMember" xlink:type="locator" xlink:label="bkgm_SeniorVicePresidentsMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SeniorVicePresidentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior vice presidents.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_SeniorVicePresidentsMember" xlink:to="bkgm_SeniorVicePresidentsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SeniorVicePresidentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior Vice Presidents [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_SeniorVicePresidentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Senior Vice Presidents [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ExecutiveVicePresidentMember" xlink:type="locator" xlink:label="srt_ExecutiveVicePresidentMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ExecutiveVicePresidentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Executive Vice President [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ExecutiveVicePresidentMember" xlink:to="srt_ExecutiveVicePresidentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ExecutiveVicePresidentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Executive Vice President [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_PresidentMember" xlink:type="locator" xlink:label="srt_PresidentMember" />
    <link:label xml:lang="en-US" xlink:label="srt_PresidentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">President [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_PresidentMember" xlink:to="srt_PresidentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_PresidentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">President [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ChiefExecutiveOfficerMember" xlink:type="locator" xlink:label="srt_ChiefExecutiveOfficerMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ChiefExecutiveOfficerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chief Executive Officer [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ChiefExecutiveOfficerMember" xlink:to="srt_ChiefExecutiveOfficerMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ChiefExecutiveOfficerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Chief Executive Officer [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:type="locator" xlink:label="us-gaap_RetirementPlanTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetirementPlanTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetirementPlanTypeAxis" xlink:to="us-gaap_RetirementPlanTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetirementPlanTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Plan Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:type="locator" xlink:label="us-gaap_RetirementPlanTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetirementPlanTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetirementPlanTypeDomain" xlink:to="us-gaap_RetirementPlanTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetirementPlanTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Plan Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:type="locator" xlink:label="us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental Executive Retirement Plan (SERP) [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:to="us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Employee Retirement Plan Defined Benefit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Defined Benefit Plan Disclosure [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:to="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Disclosure [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_DefinedContributionPensionAndOtherPostretirementPlanRequisiteServicePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Eligibility service period condition for participant under plan</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_DefinedContributionPensionAndOtherPostretirementPlanRequisiteServicePeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Pension And Other Postretirement Plan Requisite Service Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent" xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Matching contribution percentage</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent" xlink:to="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan Employer Matching Contribution Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee contribution percentage to compensation plan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" xlink:to="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan Maximum Annual Contributions Per Employee Percent</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_EmployeeDeferralMinimum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee deferral, minimum</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_EmployeeDeferralMinimum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Deferral Minimum</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_EmployeeDeferralMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee deferral, maximum</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_EmployeeDeferralMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Deferral Maximum</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MatchingContributionVestedPeriodOfService_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Matching contribution vested period of service</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MatchingContributionVestedPeriodOfService_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Matching Contribution Vested Period Of Service</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanCostRecognized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanCostRecognized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expense attributable to the plan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanCostRecognized" xlink:to="us-gaap_DefinedContributionPlanCostRecognized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanCostRecognized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan Cost Recognized</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FrequencyForMemberEntitledToReceiveEmploymentBenefitPayment" xlink:type="locator" xlink:label="bkgm_FrequencyForMemberEntitledToReceiveEmploymentBenefitPayment" />
    <link:label xml:lang="en-US" xlink:label="bkgm_FrequencyForMemberEntitledToReceiveEmploymentBenefitPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Frequency for member entitled to receive employment benefit payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_FrequencyForMemberEntitledToReceiveEmploymentBenefitPayment" xlink:to="bkgm_FrequencyForMemberEntitledToReceiveEmploymentBenefitPayment_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_RetirementPaymentsPeriodFollowingRetirementOrOtherTerminationDate" xlink:type="locator" xlink:label="bkgm_RetirementPaymentsPeriodFollowingRetirementOrOtherTerminationDate" />
    <link:label xml:lang="en-US" xlink:label="bkgm_RetirementPaymentsPeriodFollowingRetirementOrOtherTerminationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Retirement Payments Period Following Retirement Or Other Termination Date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_RetirementPaymentsPeriodFollowingRetirementOrOtherTerminationDate" xlink:to="bkgm_RetirementPaymentsPeriodFollowingRetirementOrOtherTerminationDate_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PostRetirementBenefitAmountPayablePerYear" xlink:type="locator" xlink:label="bkgm_PostRetirementBenefitAmountPayablePerYear" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PostRetirementBenefitAmountPayablePerYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Post retirement benefit amount payable per year.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PostRetirementBenefitAmountPayablePerYear" xlink:to="bkgm_PostRetirementBenefitAmountPayablePerYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PostRetirementBenefitAmountPayablePerYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement payments</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PostRetirementBenefitAmountPayablePerYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Post Retirement Benefit Amount Payable Per Year</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FrequencyForMemberEntitledToReceiveEmploymentBenefitPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Frequency for member entitled to receive employment benefit payment</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_FrequencyForMemberEntitledToReceiveEmploymentBenefitPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Frequency For Member Entitled To Receive Employment Benefit Payment</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RetirementPaymentsPeriodFollowingRetirementOrOtherTerminationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Payments Period Following Retirement Or Other Termination Date</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RetirementPaymentsPeriodFollowingRetirementOrOtherTerminationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Payments Period Following Retirement Or Other Termination Date</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeActuarialGainLossBeforeTax" xlink:type="locator" xlink:label="bkgm_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeActuarialGainLossBeforeTax" />
    <link:label xml:lang="en-US" xlink:label="bkgm_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeActuarialGainLossBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Defined benefit plan accumulated other comprehensive income actuarial gain loss before tax.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeActuarialGainLossBeforeTax" xlink:to="bkgm_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeActuarialGainLossBeforeTax_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in benefit obligation:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:to="us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Change In Benefit Obligation Roll Forward</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Benefit obligation at beginning of period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanBenefitObligation" xlink:to="us-gaap_DefinedBenefitPlanBenefitObligation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Benefit Obligation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanServiceCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Service cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanServiceCost" xlink:to="us-gaap_DefinedBenefitPlanServiceCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Service Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanInterestCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanInterestCost" xlink:to="us-gaap_DefinedBenefitPlanInterestCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Interest Cost</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Benefit obligation at end of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Funded status:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract" xlink:to="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Funded Status Of Plan [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amounts recognized in the Statement of Financial Condition</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:to="us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Amounts Recognized In Balance Sheet [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities" xlink:type="locator" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unfunded accrued SERP liability&#8212;current</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities" xlink:to="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pension And Other Postretirement Defined Benefit Plans Current Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" xlink:type="locator" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total unfunded accrued SERP liability</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" xlink:to="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pension And Other Postretirement Defined Benefit Plans Liabilities Current And Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net amount recognized in accumulated other comprehensive income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract" xlink:to="us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Amounts Recognized In Other Comprehensive Income [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prior service cost/(benefit)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:to="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit Before Tax</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeActuarialGainLossBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net actuarial loss/(gain)</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeActuarialGainLossBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Accumulated Other Comprehensive Income Actuarial Gain Loss Before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Total net amount recognized in accumulated other comprehensive income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" xlink:to="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated benefit obligation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:to="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Accumulated Benefit Obligation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net periodic SERP cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Net Periodic Benefit Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assumptions as of December 31:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract" xlink:to="us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Assumptions Used In Calculations [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assumed discount rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:to="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rate of compensation increase</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:to="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextFiveYears" xlink:type="locator" xlink:label="bkgm_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextFiveYears" />
    <link:label xml:lang="en-US" xlink:label="bkgm_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextFiveYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Defined benefit plan, expected future benefit payments, next five years.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextFiveYears" xlink:to="bkgm_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextFiveYears_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextFiveYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Benefits expected to be paid in the next five years</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextFiveYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Expected Future Benefit Payments Next Five Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected to be recognized in net periodic benefit cost during next fiscal year</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_WeightedAverageNumberOfCommonSharesOutstanding" xlink:type="locator" xlink:label="bkgm_WeightedAverageNumberOfCommonSharesOutstanding" />
    <link:label xml:lang="en-US" xlink:label="bkgm_WeightedAverageNumberOfCommonSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average number of common shares outstanding.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_WeightedAverageNumberOfCommonSharesOutstanding" xlink:to="bkgm_WeightedAverageNumberOfCommonSharesOutstanding_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:type="locator" xlink:label="us-gaap_EarningsPerShareAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareAbstract" xlink:to="us-gaap_EarningsPerShareAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockDividendsIncomeStatementImpact_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Less preferred stock dividends</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net income attributable to common stockholders</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_WeightedAverageNumberOfCommonSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average number of common shares outstanding - used to calculate basic anddiluted earnings per common share</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_WeightedAverageNumberOfCommonSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number Of Common Shares Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Earnings per common share:</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesTable" xlink:type="locator" xlink:label="us-gaap_LossContingenciesTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingencies [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesTable" xlink:to="us-gaap_LossContingenciesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:type="locator" xlink:label="us-gaap_CreditFacilityAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:type="locator" xlink:label="us-gaap_CreditFacilityDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="us-gaap_CreditFacilityDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:type="locator" xlink:label="us-gaap_LetterOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letters of Credit [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LetterOfCreditMember" xlink:to="us-gaap_LetterOfCreditMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Letter Of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsToExtendCreditMember" xlink:type="locator" xlink:label="us-gaap_CommitmentsToExtendCreditMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsToExtendCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments to Extend Credit [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsToExtendCreditMember" xlink:to="us-gaap_CommitmentsToExtendCreditMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsToExtendCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments To Extend Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:type="locator" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingency Nature</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:to="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies By Nature Of Contingency [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:type="locator" xlink:label="us-gaap_LossContingencyNatureDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingency, Nature</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencyNatureDomain" xlink:to="us-gaap_LossContingencyNatureDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Nature [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StandbyLettersOfCreditMember" xlink:type="locator" xlink:label="us-gaap_StandbyLettersOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StandbyLettersOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Standby Letters of Credit [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StandbyLettersOfCreditMember" xlink:to="us-gaap_StandbyLettersOfCreditMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StandbyLettersOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Standby Letters Of Credit [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_CommercialLettersOfCreditMember" xlink:type="locator" xlink:label="bkgm_CommercialLettersOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_CommercialLettersOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial letters of credit.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_CommercialLettersOfCreditMember" xlink:to="bkgm_CommercialLettersOfCreditMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_CommercialLettersOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial Letters Of Credit [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_CommercialLettersOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Letters Of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:type="locator" xlink:label="us-gaap_LossContingenciesLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingencies [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesLineItems" xlink:to="us-gaap_LossContingenciesLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability" xlink:type="locator" xlink:label="us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instrument with off-balance-sheet risk</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability" xlink:to="us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosure Offbalance Sheet Risks Amount Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnderlyingAssetClassAxis" xlink:type="locator" xlink:label="us-gaap_UnderlyingAssetClassAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnderlyingAssetClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underlying Asset Class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnderlyingAssetClassAxis" xlink:to="us-gaap_UnderlyingAssetClassAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnderlyingAssetClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Underlying Asset Class [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnderlyingAssetClassDomain" xlink:type="locator" xlink:label="us-gaap_UnderlyingAssetClassDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnderlyingAssetClassDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underlying Asset Class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnderlyingAssetClassDomain" xlink:to="us-gaap_UnderlyingAssetClassDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnderlyingAssetClassDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Underlying Asset Class [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CollateralizedSecuritiesMember" xlink:type="locator" xlink:label="us-gaap_CollateralizedSecuritiesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollateralizedSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collateral Securities Based on Credit Evaluation of Customer [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CollateralizedSecuritiesMember" xlink:to="us-gaap_CollateralizedSecuritiesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollateralizedSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Collateralized Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:type="locator" xlink:label="us-gaap_GuaranteeObligationsCurrentCarryingValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GuaranteeObligationsCurrentCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reserve liabilities associated with guarantees</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:to="us-gaap_GuaranteeObligationsCurrentCarryingValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GuaranteeObligationsCurrentCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Guarantee Obligations Current Carrying Value</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_LettersOfCreditExpirationDateMaximum" xlink:type="locator" xlink:label="bkgm_LettersOfCreditExpirationDateMaximum" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LettersOfCreditExpirationDateMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Letters of credit expiration date maximum.</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgm_LettersOfCreditExpirationDateMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letters of credit expiration date maximum</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LettersOfCreditExpirationDateMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Letters Of Credit Expiration Date Maximum</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_GuaranteeMaturityMaximum" xlink:type="locator" xlink:label="bkgm_GuaranteeMaturityMaximum" />
    <link:label xml:lang="en-US" xlink:label="bkgm_GuaranteeMaturityMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Guarantee maturity maximum.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_GuaranteeMaturityMaximum" xlink:to="bkgm_GuaranteeMaturityMaximum_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BankAcceptancesExecuted" xlink:type="locator" xlink:label="us-gaap_BankAcceptancesExecuted" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BankAcceptancesExecuted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum undiscounted future payments</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_BankAcceptancesExecuted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bank Acceptances Executed</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_GuaranteeMaturityMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Guarantee maturity maximum</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_GuaranteeMaturityMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Guarantee Maturity Maximum</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_UnpaidPrincipalBalancesOfMortgageLoansServicedForOthers" xlink:type="locator" xlink:label="bkgm_UnpaidPrincipalBalancesOfMortgageLoansServicedForOthers" />
    <link:label xml:lang="en-US" xlink:label="bkgm_UnpaidPrincipalBalancesOfMortgageLoansServicedForOthers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Unpaid principal balance of mortgage loans serviced for others.</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgm_UnpaidPrincipalBalancesOfMortgageLoansServicedForOthers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unpaid principal balances of mortgage loans serviced</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_UnpaidPrincipalBalancesOfMortgageLoansServicedForOthers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unpaid Principal Balances Of Mortgage Loans Serviced For Others</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ServicingAssetAtFairValueAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mortgage servicing rights at their fair value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ServicingAssetAtFairValueAmount" xlink:to="us-gaap_ServicingAssetAtFairValueAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ServicingAssetAtFairValueAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Servicing Asset At Fair Value Amount</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_TierOneCommonEquityToRiskWeightedAssetsMinimum" xlink:type="locator" xlink:label="bkgm_TierOneCommonEquityToRiskWeightedAssetsMinimum" />
    <link:label xml:lang="en-US" xlink:label="bkgm_TierOneCommonEquityToRiskWeightedAssetsMinimum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common equity to risk weighted assets minimum.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_TierOneCommonEquityToRiskWeightedAssetsMinimum" xlink:to="bkgm_TierOneCommonEquityToRiskWeightedAssetsMinimum_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_MinimumNonRiskBasedLeverageRatio" xlink:type="locator" xlink:label="bkgm_MinimumNonRiskBasedLeverageRatio" />
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNonRiskBasedLeverageRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum non risk based leverage ratio.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_MinimumNonRiskBasedLeverageRatio" xlink:to="bkgm_MinimumNonRiskBasedLeverageRatio_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_MinimumNonRiskBasedLeverageRatioForHigherRatedBank" xlink:type="locator" xlink:label="bkgm_MinimumNonRiskBasedLeverageRatioForHigherRatedBank" />
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNonRiskBasedLeverageRatioForHigherRatedBank_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum non risk based leverage ratio for higher rated bank.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_MinimumNonRiskBasedLeverageRatioForHigherRatedBank" xlink:to="bkgm_MinimumNonRiskBasedLeverageRatioForHigherRatedBank_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_CapitalConservationBuffer" xlink:type="locator" xlink:label="bkgm_CapitalConservationBuffer" />
    <link:label xml:lang="en-US" xlink:label="bkgm_CapitalConservationBuffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Capital conservation buffer.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_CapitalConservationBuffer" xlink:to="bkgm_CapitalConservationBuffer_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_CapitalConservationBufferPhaseInAmount" xlink:type="locator" xlink:label="bkgm_CapitalConservationBufferPhaseInAmount" />
    <link:label xml:lang="en-US" xlink:label="bkgm_CapitalConservationBufferPhaseInAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Capital conservation buffer phase in amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_CapitalConservationBufferPhaseInAmount" xlink:to="bkgm_CapitalConservationBufferPhaseInAmount_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure" xlink:type="locator" xlink:label="bkgm_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure" />
    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of period assigned for non accrual status for higher risk weighting to exposure.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure" xlink:to="bkgm_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue" xlink:type="locator" xlink:label="bkgm_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Permitted composition for tier one capital consolidated assets value.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue" xlink:to="bkgm_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PermittedCompositionForTierOneCapitalForeignExposures" xlink:type="locator" xlink:label="bkgm_PermittedCompositionForTierOneCapitalForeignExposures" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PermittedCompositionForTierOneCapitalForeignExposures_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Permitted composition for tier one capital foreign exposures.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PermittedCompositionForTierOneCapitalForeignExposures" xlink:to="bkgm_PermittedCompositionForTierOneCapitalForeignExposures_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Compliance With Regulatory Capital Requirements For Mortgage Companies [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable" xlink:to="us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Compliance With Regulatory Capital Requirements For Mortgage Companies [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryAgencyAxis" xlink:type="locator" xlink:label="us-gaap_RegulatoryAgencyAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RegulatoryAgencyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regulatory Agency</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryAgencyAxis" xlink:to="us-gaap_RegulatoryAgencyAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RegulatoryAgencyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Agency [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:type="locator" xlink:label="us-gaap_RegulatoryAgencyDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RegulatoryAgencyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regulatory Agency</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryAgencyDomain" xlink:to="us-gaap_RegulatoryAgencyDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RegulatoryAgencyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Agency [Domain]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_BaselThreeMember" xlink:type="locator" xlink:label="bkgm_BaselThreeMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BaselThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Basel Three.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_BaselThreeMember" xlink:to="bkgm_BaselThreeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BaselThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basel III [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_BaselThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Basel Three [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Non-Cumulative Perpetual Preferred Stock [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PublicOfferingMember" xlink:type="locator" xlink:label="bkgm_PublicOfferingMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PublicOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Public offering.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PublicOfferingMember" xlink:to="bkgm_PublicOfferingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PublicOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public Offering [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PublicOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Public Offering [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrivatePlacementMember" xlink:type="locator" xlink:label="us-gaap_PrivatePlacementMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrivatePlacementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Private Placement [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrivatePlacementMember" xlink:to="us-gaap_PrivatePlacementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrivatePlacementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Private Placement [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:type="locator" xlink:label="us-gaap_StatementClassOfStockAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_StatementClassOfStockAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Class Of Stock [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:type="locator" xlink:label="us-gaap_ClassOfStockDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_ClassOfStockDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Stock [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeriesAPreferredStockMember" xlink:type="locator" xlink:label="us-gaap_SeriesAPreferredStockMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SeriesAPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Non-Cumulative Perpetual Preferred Stock [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeriesAPreferredStockMember" xlink:to="us-gaap_SeriesAPreferredStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SeriesAPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Series A Preferred Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems" xlink:type="locator" xlink:label="us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Compliance With Regulatory Capital Requirements For Mortgage Companies [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems" xlink:to="us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Compliance With Regulatory Capital Requirements For Mortgage Companies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TierOneCommonEquityToRiskWeightedAssetsMinimum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common equity tier 1 capital (to risk weighted assets), minimum</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TierOneCommonEquityToRiskWeightedAssetsMinimum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Common Equity To Risk Weighted Assets Minimum</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Capital requirement tier 1 capital (to risk weighted assets)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNonRiskBasedLeverageRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non risk based leverage ratio, minimum</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNonRiskBasedLeverageRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Non Risk Based Leverage Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNonRiskBasedLeverageRatioForHigherRatedBank_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non risk based leverage ratio for higher rated bank, minimum</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNonRiskBasedLeverageRatioForHigherRatedBank_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Non Risk Based Leverage Ratio For Higher Rated Bank</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_CapitalConservationBuffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital conservation buffer</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_CapitalConservationBuffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Conservation Buffer</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_CapitalConservationBufferPhaseInAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital conservation buffer phase in amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_CapitalConservationBufferPhaseInAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Conservation Buffer Phase In Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of days assigned for non accrual Status for higher risk weighting to exposure</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Period Assigned For Non Accrual Status For Higher Risk Weighting To Exposure</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Permitted composition for tier one capital consolidated assets value</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Permitted Composition For Tier One Capital Consolidated Assets Value</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PermittedCompositionForTierOneCapitalForeignExposures_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Permitted composition for tier one capital foreign exposures</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PermittedCompositionForTierOneCapitalForeignExposures_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Permitted Composition For Tier One Capital Foreign Exposures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Capital" xlink:type="locator" xlink:label="us-gaap_Capital" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Capital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital (to Risk Weighted Assets), Actual, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Capital" xlink:to="us-gaap_Capital_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Capital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TierOneRiskBasedCapital" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapital" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital (to Risk Weighted Assets), Actual, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapital" xlink:to="us-gaap_TierOneRiskBasedCapital_lbl" />
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    <link:label xml:lang="en-US" xlink:label="bkgm_TierOneCommonEquityCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Equity Tier 1 Capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_TierOneCommonEquityCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Common Equity Capital Required To Be Well Capitalized To Risk Weighted Assets</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ApprovedStockIssuanceAmount" xlink:type="locator" xlink:label="bkgm_ApprovedStockIssuanceAmount" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ApprovedStockIssuanceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Approved stock issuance amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ApprovedStockIssuanceAmount" xlink:to="bkgm_ApprovedStockIssuanceAmount_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PercentageOfIncreaseInAssets" xlink:type="locator" xlink:label="bkgm_PercentageOfIncreaseInAssets" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfIncreaseInAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of increase in assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PercentageOfIncreaseInAssets" xlink:to="bkgm_PercentageOfIncreaseInAssets_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_GrowthOfAssetsDuringPeriod" xlink:type="locator" xlink:label="bkgm_GrowthOfAssetsDuringPeriod" />
    <link:label xml:lang="en-US" xlink:label="bkgm_GrowthOfAssetsDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Growth of assets during period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_GrowthOfAssetsDuringPeriod" xlink:to="bkgm_GrowthOfAssetsDuringPeriod_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_PercentageOfIncreaseInShareholdersEquity" xlink:type="locator" xlink:label="bkgm_PercentageOfIncreaseInShareholdersEquity" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfIncreaseInShareholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of increase in shareholder&apos;s equity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_PercentageOfIncreaseInShareholdersEquity" xlink:to="bkgm_PercentageOfIncreaseInShareholdersEquity_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_GrowthOfEquityDuringPeriod" xlink:type="locator" xlink:label="bkgm_GrowthOfEquityDuringPeriod" />
    <link:label xml:lang="en-US" xlink:label="bkgm_GrowthOfEquityDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Growth of equity during period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_GrowthOfEquityDuringPeriod" xlink:to="bkgm_GrowthOfEquityDuringPeriod_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_GrowthOfRetainedEarningsDuringPeriod" xlink:type="locator" xlink:label="bkgm_GrowthOfRetainedEarningsDuringPeriod" />
    <link:label xml:lang="en-US" xlink:label="bkgm_GrowthOfRetainedEarningsDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Growth of retained earnings during period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_GrowthOfRetainedEarningsDuringPeriod" xlink:to="bkgm_GrowthOfRetainedEarningsDuringPeriod_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfIncreaseInAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of assets growth since formation</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfIncreaseInAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Increase In Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_GrowthOfAssetsDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Growth of assets value since formation</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_GrowthOfAssetsDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Growth Of Assets During Period</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfIncreaseInShareholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of equity growth since formation</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_PercentageOfIncreaseInShareholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Increase In Shareholders Equity</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_GrowthOfEquityDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Growth of equity value since formation</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_GrowthOfEquityDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Growth Of Equity During Period</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_GrowthOfRetainedEarningsDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Growth of retained earnings since formation</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_GrowthOfRetainedEarningsDuringPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Growth Of Retained Earnings During Period</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ApprovedStockIssuanceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Approved stock issuance amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ApprovedStockIssuanceAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Approved Stock Issuance Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock issued during period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharePrice" xlink:type="locator" xlink:label="us-gaap_SharePrice" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price per share</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharePrice" xlink:to="us-gaap_SharePrice_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Price</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_MinimumNumberOfStockPurchasedValue" xlink:type="locator" xlink:label="bkgm_MinimumNumberOfStockPurchasedValue" />
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNumberOfStockPurchasedValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum number of stock purchased value.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_MinimumNumberOfStockPurchasedValue" xlink:to="bkgm_MinimumNumberOfStockPurchasedValue_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_MinimumNumberOfStockPurchasedShares" xlink:type="locator" xlink:label="bkgm_MinimumNumberOfStockPurchasedShares" />
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNumberOfStockPurchasedShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum number of stock purchased shares.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_MinimumNumberOfStockPurchasedShares" xlink:to="bkgm_MinimumNumberOfStockPurchasedShares_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_SaleOfStockExpirationDate" xlink:type="locator" xlink:label="bkgm_SaleOfStockExpirationDate" />
    <link:label xml:lang="en-US" xlink:label="bkgm_SaleOfStockExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of stock expiration date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_SaleOfStockExpirationDate" xlink:to="bkgm_SaleOfStockExpirationDate_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SaleOfStockTransactionDate" xlink:type="locator" xlink:label="us-gaap_SaleOfStockTransactionDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockTransactionDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commencing date for preferred stock shares issuance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockTransactionDate" xlink:to="us-gaap_SaleOfStockTransactionDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockTransactionDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Transaction Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:type="locator" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate preferred stock shares for issuances</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Number Of Shares Issued In Transaction</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SaleOfStockPricePerShare" xlink:type="locator" xlink:label="us-gaap_SaleOfStockPricePerShare" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subscription price per share</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockPricePerShare" xlink:to="us-gaap_SaleOfStockPricePerShare_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Price Per Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockDividendRatePercentage" xlink:type="locator" xlink:label="us-gaap_PreferredStockDividendRatePercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockDividendRatePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock yield percentage</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendRatePercentage" xlink:to="us-gaap_PreferredStockDividendRatePercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockDividendRatePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Dividend Rate Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds form private placements</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:to="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Private Placement</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNumberOfStockPurchasedValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum number of stock purchased, value</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNumberOfStockPurchasedValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Number Of Stock Purchased Value</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNumberOfStockPurchasedShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum number of stock purchased, shares</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_MinimumNumberOfStockPurchasedShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Number Of Stock Purchased Shares</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_SaleOfStockExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expiration date for preferred stock shares issuance</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_SaleOfStockExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Expiration Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScheduleOfCondensedFinancialStatementsTable" xlink:type="locator" xlink:label="srt_ScheduleOfCondensedFinancialStatementsTable" />
    <link:label xml:lang="en-US" xlink:label="srt_ScheduleOfCondensedFinancialStatementsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Condensed Financial Statements [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:label="srt_ScheduleOfCondensedFinancialStatementsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Condensed Financial Statements [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:type="locator" xlink:label="srt_ConsolidatedEntitiesAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidated Entities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:type="locator" xlink:label="srt_ConsolidatedEntitiesDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidated Entities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="srt_ConsolidatedEntitiesDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ParentCompanyMember" xlink:type="locator" xlink:label="srt_ParentCompanyMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ParentCompanyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Parent Company [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ParentCompanyMember" xlink:to="srt_ParentCompanyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ParentCompanyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Parent Company [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedFinancialStatementsCaptionsLineItems" xlink:type="locator" xlink:label="srt_CondensedFinancialStatementsCaptionsLineItems" />
    <link:label xml:lang="en-US" xlink:label="srt_CondensedFinancialStatementsCaptionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Condensed Financial Statements Captions [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CondensedFinancialStatementsCaptionsLineItems" xlink:to="srt_CondensedFinancialStatementsCaptionsLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_CondensedFinancialStatementsCaptionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Condensed Financial Statements Captions [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DueFromAffiliates" xlink:type="locator" xlink:label="us-gaap_DueFromAffiliates" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DueFromAffiliates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Due from subsidiaries</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DueFromAffiliates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Due From Affiliates</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesAmountOfEquity" xlink:type="locator" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAmountOfEquity" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAmountOfEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in subsidiaries</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders&#8217; equity</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Frequency</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByMeasurementFrequencyAxis" xlink:to="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Frequency</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Frequency [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsRecurringMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value on Recurring Basis [Member]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value By Fair Value Hierarchy Level [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel1Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Inputs Level1 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel2Member" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Inputs Level2 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel3Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Unobservable Inputs (Level 3) [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Inputs Level3 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_USTreasurySecuritiesMember" xlink:type="locator" xlink:label="us-gaap_USTreasurySecuritiesMember" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_USTreasurySecuritiesMember" xlink:to="us-gaap_USTreasurySecuritiesMember_lbl" />
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    <link:label xml:lang="en-US" xlink:label="bkgm_USGovernmentAgenciesAndSponsoredEnterprisesDebtSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">US government agencies and sponsored enterprises debt securities.</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure" />
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    <link:label xml:lang="en-US" xlink:label="bkgm_FederalHomeLoanBankStockFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Home Loan Bank stock</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:type="locator" xlink:label="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial liabilities:</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepositsFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_DepositsFairValueDisclosure" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net issuances</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning deposit balance</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net deposits</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases Sales Issuances Settlements</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending deposit balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Table]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansReceivableFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Loans, Estimated Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansHeldForSaleValuationTechniqueExtensibleList" xlink:type="locator" xlink:label="us-gaap_LoansHeldForSaleValuationTechniqueExtensibleList" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansHeldForSaleValuationTechniqueExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans, Valuation Technique [Extensible List]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansHeldForSaleValuationTechniqueExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Held For Sale Valuation Technique Extensible List</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LoansHeldForSaleMeasurementInputExtensibleList" xlink:type="locator" xlink:label="us-gaap_LoansHeldForSaleMeasurementInputExtensibleList" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansHeldForSaleMeasurementInputExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans, Measurement Input [Extensible List]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansHeldForSaleMeasurementInputExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Held For Sale Measurement Input Extensible List</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Deposits, Estimated Fair Value</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ServicingLiabilityValuationTechniqueExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Servicing Liability Valuation Technique Extensible List</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ServicingLiabilityMeasurementInputExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Servicing Liability Measurement Input Extensible List</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ServicingLiabilityMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Servicing Liability Measurement Input</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_FederalFundsPurchasedAndFHLBAdvancesToBeTreatedAsShortTermBorrowingsMaturityPeriod" xlink:type="locator" xlink:label="bkgm_FederalFundsPurchasedAndFHLBAdvancesToBeTreatedAsShortTermBorrowingsMaturityPeriod" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_LeaseLineItems" xlink:type="locator" xlink:label="bkgm_LeaseLineItems" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_LeaseLineItems" xlink:to="bkgm_LeaseLineItems_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_LeaseTable" xlink:type="locator" xlink:label="bkgm_LeaseTable" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_LeaseTable" xlink:to="bkgm_LeaseTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease [Table]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_BankFacilityLeaseMember" xlink:type="locator" xlink:label="bkgm_BankFacilityLeaseMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BankFacilityLeaseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Bank facility lease.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_BankFacilityLeaseMember" xlink:to="bkgm_BankFacilityLeaseMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_BankFacilityLeaseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank Facility Lease [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_BankFacilityLeaseMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bank Facility Lease [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseOptionToExtend" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease option to extend description</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseOptionToExtend" xlink:to="us-gaap_LesseeOperatingLeaseOptionToExtend_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Option To Extend</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease option to extend</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend" xlink:to="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Existence Of Option To Extend</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseRenewalTerm" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseRenewalTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease option to extend</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseRenewalTerm" xlink:to="us-gaap_LesseeOperatingLeaseRenewalTerm_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseRenewalTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Renewal Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasePayments" xlink:type="locator" xlink:label="us-gaap_OperatingLeasePayments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease payments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasePayments" xlink:to="us-gaap_OperatingLeasePayments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Payments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LessorOperatingLeaseTermOfContract" xlink:type="locator" xlink:label="us-gaap_LessorOperatingLeaseTermOfContract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LessorOperatingLeaseTermOfContract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Original operating lease term</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LessorOperatingLeaseTermOfContract" xlink:to="us-gaap_LessorOperatingLeaseTermOfContract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LessorOperatingLeaseTermOfContract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessor Operating Lease Term Of Contract</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LessorOperatingLeaseRenewalTerm" xlink:type="locator" xlink:label="us-gaap_LessorOperatingLeaseRenewalTerm" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LessorOperatingLeaseRenewalTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease renewal term</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LessorOperatingLeaseRenewalTerm" xlink:to="us-gaap_LessorOperatingLeaseRenewalTerm_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LessorOperatingLeaseRenewalTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessor Operating Lease Renewal Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum future rents to be received under non-cancelable operating sublease agreements, 2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths" xlink:to="us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessor Operating Lease Payments To Be Received Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears" xlink:type="locator" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum future rents to be received under non-cancelable operating sublease agreements, 2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears" xlink:to="us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessor Operating Lease Payments To Be Received Two Years</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_LeaseAsset" xlink:type="locator" xlink:label="bkgm_LeaseAsset" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease asset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_LeaseAsset" xlink:to="bkgm_LeaseAsset_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating lease right-of-use assets</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease assets</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilityCurrent" xlink:to="us-gaap_OperatingLeaseLiabilityCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Liability Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Liability Noncurrent</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseCost" xlink:to="us-gaap_OperatingLeaseCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermLeaseCost" xlink:type="locator" xlink:label="us-gaap_ShortTermLeaseCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short term leases</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermLeaseCost" xlink:to="us-gaap_ShortTermLeaseCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Lease Cost</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_LeaseLiabilityPaymentsDue" xlink:type="locator" xlink:label="bkgm_LeaseLiabilityPaymentsDue" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease liability payments due.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_LeaseLiabilityPaymentsDue" xlink:to="bkgm_LeaseLiabilityPaymentsDue_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Leases</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract" xlink:to="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Liabilities Payments Due [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Leases, 2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Leases, 2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Leases, 2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Leases, 2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Leases, 2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Leases, After 2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due After Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating Leases, Total lease payments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Leases, Less: Interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Undiscounted Excess Amount</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_LeaseLiabilitiesPaymentsDueAbstract" xlink:type="locator" xlink:label="bkgm_LeaseLiabilitiesPaymentsDueAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease liabilities payments due.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_LeaseLiabilitiesPaymentsDueAbstract" xlink:to="bkgm_LeaseLiabilitiesPaymentsDueAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liabilities Payments Due [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liability, 2020</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liability Payments Due Next Twelve Months</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liability, 2021</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liability Payments Due Year Two</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liability, 2022</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liability Payments Due Year Three</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liability, 2023</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liability Payments Due Year Four</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liability, 2024</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liability Payments Due Year Five</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liability, After 2024</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liability Payments Due After Year Five</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Lease liability, Total lease payments</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liability Payments Due</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityUndiscountedExcessAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liability, Less: Interest</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiabilityUndiscountedExcessAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liability Undiscounted Excess Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_LeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liability, Present value of lease liabilities</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_OperatingLeasePaymentsRelatedToOptionsToExtendLease" xlink:type="locator" xlink:label="bkgm_OperatingLeasePaymentsRelatedToOptionsToExtendLease" />
    <link:label xml:lang="en-US" xlink:label="bkgm_OperatingLeasePaymentsRelatedToOptionsToExtendLease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating lease payments related to options to extend lease.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_OperatingLeasePaymentsRelatedToOptionsToExtendLease" xlink:to="bkgm_OperatingLeasePaymentsRelatedToOptionsToExtendLease_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_OperatingLeasePaymentsRelatedToOptionsToExtendLease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease payments related to option to extend lease</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_OperatingLeasePaymentsRelatedToOptionsToExtendLease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Payments Related To Options To Extend Lease</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Current portion of operating lease liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:to="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Weighted Average Remaining Lease Term1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:to="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Weighted Average Discount Rate Percent</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage" xlink:type="locator" xlink:label="bkgm_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage" />
    <link:label xml:lang="en-US" xlink:label="bkgm_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Revenue from contract with customer excluding assessed tax percentage.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage" xlink:to="bkgm_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_RevenueRecognitionLineItems" xlink:type="locator" xlink:label="bkgm_RevenueRecognitionLineItems" />
    <link:label xml:lang="en-US" xlink:label="bkgm_RevenueRecognitionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Revenue recognition.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_RevenueRecognitionLineItems" xlink:to="bkgm_RevenueRecognitionLineItems_lbl" />
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_RevenueRecognitionTable" xlink:type="locator" xlink:label="bkgm_RevenueRecognitionTable" />
    <link:label xml:lang="en-US" xlink:label="bkgm_RevenueRecognitionTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Revenue recognition.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_RevenueRecognitionTable" xlink:to="bkgm_RevenueRecognitionTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_RevenueRecognitionTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Recognition [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RevenueRecognitionTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Recognition [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis" xlink:type="locator" xlink:label="srt_ProductOrServiceAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductOrServiceAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Product Or Service [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:type="locator" xlink:label="srt_ProductsAndServicesDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductsAndServicesDomain" xlink:to="srt_ProductsAndServicesDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Products And Services [Domain]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ServiceChargesOnDepositAccountsMember" xlink:type="locator" xlink:label="bkgm_ServiceChargesOnDepositAccountsMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ServiceChargesOnDepositAccountsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Service charges on deposit accounts.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ServiceChargesOnDepositAccountsMember" xlink:to="bkgm_ServiceChargesOnDepositAccountsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ServiceChargesOnDepositAccountsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Service Charges on Deposit Accounts [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ServiceChargesOnDepositAccountsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Service Charges On Deposit Accounts [Member]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_OnlineFeesMember" xlink:type="locator" xlink:label="bkgm_OnlineFeesMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_OnlineFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Online fees</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_OnlineFeesMember" xlink:to="bkgm_OnlineFeesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_OnlineFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Online Fees [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_OnlineFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Online Fees [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RevenueRecognitionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Recognition [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RevenueRecognitionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Recognition [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:type="locator" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue From Contract With Customer Excluding Assessed Tax</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of total revenue</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue From Contract With Customer Excluding Assessed Tax Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateAxis" xlink:type="locator" xlink:label="us-gaap_VariableRateAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateDomain" xlink:type="locator" xlink:label="us-gaap_VariableRateDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_VariableRateDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Domain]</link:label>
    <link:loc xlink:href="bkgm-20191231.xsd#bkgm_ThreeMonthLIBORMember" xlink:type="locator" xlink:label="bkgm_ThreeMonthLIBORMember" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ThreeMonthLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Three-month LIBOR.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgm_ThreeMonthLIBORMember" xlink:to="bkgm_ThreeMonthLIBORMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgm_ThreeMonthLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Three-month LIBOR [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgm_ThreeMonthLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Three Month L I B O R [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentLineItems" />
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