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<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2019-08-08T10:55:22.3271963+00:00 -->
<!-- Version            : 3.6.7150.26138 -->
<!-- Package ID         : af3e196a4fe14bb2a1e0428426652ecd -->
<!-- Copyright (c) 2019 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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    <link:label xml:lang="en-US" xlink:label="bkgmf_LeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease liability payments due year two.</link:label>
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_LeaseLiabilityPaymentsDueYearFive" xlink:type="locator" xlink:label="bkgmf_LeaseLiabilityPaymentsDueYearFive" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_LeaseLiabilityPaymentsDueAfterYearFive" xlink:type="locator" xlink:label="bkgmf_LeaseLiabilityPaymentsDueAfterYearFive" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_LeaseLiabilityUndiscountedExcessAmount" xlink:type="locator" xlink:label="bkgmf_LeaseLiabilityUndiscountedExcessAmount" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_LeaseLiability" xlink:type="locator" xlink:label="bkgmf_LeaseLiability" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_LeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease liability.</link:label>
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityFilerCategory" xlink:type="locator" xlink:label="dei_EntityFilerCategory" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntitySmallBusiness" xlink:type="locator" xlink:label="dei_EntitySmallBusiness" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASSETS</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestBearingDepositsInBanks" xlink:type="locator" xlink:label="us-gaap_InterestBearingDepositsInBanks" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositsInBanks_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Deposits In Banks</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:type="locator" xlink:label="us-gaap_RestrictedCashAndCashEquivalents" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:type="locator" xlink:label="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities" />
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    <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>
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    <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>
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    <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>
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    <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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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 6)</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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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; 9,692 and 9,679 shares issued and 9,660 and 9,646 shares outstanding at 6/30/19 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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockValue" xlink:type="locator" xlink:label="us-gaap_TreasuryStockValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValue_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_TreasuryStockValue" xlink:to="us-gaap_TreasuryStockValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities and stockholders&#8217; equity</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities And Stockholders Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesFairValue" xlink:type="locator" xlink:label="us-gaap_HeldToMaturitySecuritiesFairValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_HeldToMaturitySecuritiesFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Investment securities held-to-maturity, Fair Value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HeldToMaturitySecuritiesFairValue" xlink:to="us-gaap_HeldToMaturitySecuritiesFairValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_HeldToMaturitySecuritiesFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Held To Maturity Securities Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowance" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans, net of 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_LoansAndLeasesReceivableAllowance" xlink:to="us-gaap_LoansAndLeasesReceivableAllowance_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Allowance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:type="locator" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Par Or Stated Value Per Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesAuthorized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesIssued" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesOutstanding" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares outstanding</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:type="locator" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, par value</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Shares Authorized</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockShares" xlink:type="locator" xlink:label="us-gaap_TreasuryStockShares" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_ServiceChargesAndFees" xlink:type="locator" xlink:label="bkgmf_ServiceChargesAndFees" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_IncomeFromMerchantServicesNet" xlink:type="locator" xlink:label="bkgmf_IncomeFromMerchantServicesNet" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_CardholdersIncomeNet" xlink:type="locator" xlink:label="bkgmf_CardholdersIncomeNet" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_CardholdersIncomeNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Cardholders income, net</link:label>
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_NoninterestIncomeTrusteeFees" xlink:type="locator" xlink:label="bkgmf_NoninterestIncomeTrusteeFees" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_NoninterestIncomeTrusteeFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Noninterest income trustee fees.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_NoninterestIncomeTrusteeFees" xlink:to="bkgmf_NoninterestIncomeTrusteeFees_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_OtherRealEstateOwnedExpense" xlink:type="locator" xlink:label="bkgmf_OtherRealEstateOwnedExpense" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_OtherRealEstateOwnedExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other real estate owned expense.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_OtherRealEstateOwnedExpense" xlink:to="bkgmf_OtherRealEstateOwnedExpense_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_StationeryAndSuppliesExpense" xlink:type="locator" xlink:label="bkgmf_StationeryAndSuppliesExpense" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_StationeryAndSuppliesExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stationery and supplies expense.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_StationeryAndSuppliesExpense" xlink:to="bkgmf_StationeryAndSuppliesExpense_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_GeneralAdministrativeAndOtherExpense" xlink:type="locator" xlink:label="bkgmf_GeneralAdministrativeAndOtherExpense" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_GeneralAdministrativeAndOtherExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">General, administrative and other expense.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_GeneralAdministrativeAndOtherExpense" xlink:to="bkgmf_GeneralAdministrativeAndOtherExpense_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeStatementAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndDividendIncomeOperatingAbstract" xlink:type="locator" xlink:label="us-gaap_InterestAndDividendIncomeOperatingAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeOperatingAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndDividendIncomeOperatingAbstract" xlink:to="us-gaap_InterestAndDividendIncomeOperatingAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeOperatingAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest And Dividend Income Operating [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeases" xlink:type="locator" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeases" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeases_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndFeeIncomeLoansAndLeases" xlink:to="us-gaap_InterestAndFeeIncomeLoansAndLeases_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeases_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest And Fee Income Loans And Leases</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndDividendIncomeSecurities" xlink:type="locator" xlink:label="us-gaap_InterestAndDividendIncomeSecurities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeSecurities_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_InterestAndDividendIncomeSecurities" xlink:to="us-gaap_InterestAndDividendIncomeSecurities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest And Dividend Income Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeDepositsWithFinancialInstitutions" xlink:type="locator" xlink:label="us-gaap_InterestIncomeDepositsWithFinancialInstitutions" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeDepositsWithFinancialInstitutions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits with banks</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeDepositsWithFinancialInstitutions" xlink:to="us-gaap_InterestIncomeDepositsWithFinancialInstitutions_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeDepositsWithFinancialInstitutions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income Deposits With Financial Institutions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndDividendIncomeOperating" xlink:type="locator" xlink:label="us-gaap_InterestAndDividendIncomeOperating" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeOperating_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total interest income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndDividendIncomeOperating" xlink:to="us-gaap_InterestAndDividendIncomeOperating_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeOperating_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest And Dividend Income Operating</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseAbstract" xlink:type="locator" xlink:label="us-gaap_InterestExpenseAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseAbstract" xlink:to="us-gaap_InterestExpenseAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseSavingsDeposits" xlink:type="locator" xlink:label="us-gaap_InterestExpenseSavingsDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseSavingsDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Savings deposits</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseSavingsDeposits" xlink:to="us-gaap_InterestExpenseSavingsDeposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseSavingsDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense Savings Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseTimeDeposits" xlink:type="locator" xlink:label="us-gaap_InterestExpenseTimeDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseTimeDeposits_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_InterestExpenseTimeDeposits" xlink:to="us-gaap_InterestExpenseTimeDeposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseTimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense Time Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseOther" xlink:type="locator" xlink:label="us-gaap_InterestExpenseOther" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other borrowed funds</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseOther" xlink:to="us-gaap_InterestExpenseOther_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpense" xlink:type="locator" xlink:label="us-gaap_InterestExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total interest expense</link:label>
    <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/2018/elts/us-gaap-2018-01-31.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" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeExpenseNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income Expense Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProvisionForLoanAndLeaseLosses" xlink:type="locator" xlink:label="us-gaap_ProvisionForLoanAndLeaseLosses" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProvisionForLoanAndLeaseLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">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_ProvisionForLoanAndLeaseLosses" xlink:to="us-gaap_ProvisionForLoanAndLeaseLosses_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProvisionForLoanAndLeaseLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Provision For Loan And Lease Losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestIncomeAbstract" xlink:type="locator" xlink:label="us-gaap_NoninterestIncomeAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestIncomeAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-interest income:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoninterestIncomeAbstract" xlink:to="us-gaap_NoninterestIncomeAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestIncomeAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Income [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_ServiceChargesAndFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Service charges and fees</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_ServiceChargesAndFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Service Charges And Fees</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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">Loss 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" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtAndEquitySecuritiesGainLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt And Equity Securities Gain Loss</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_IncomeFromMerchantServicesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income from merchant services, net</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_IncomeFromMerchantServicesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income From Merchant Services Net</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestIncomeOther" xlink:type="locator" xlink:label="us-gaap_NoninterestIncomeOther" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Communication" xlink:type="locator" xlink:label="us-gaap_Communication" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalDepositInsuranceCorporationPremiumExpense" xlink:type="locator" xlink:label="us-gaap_FederalDepositInsuranceCorporationPremiumExpense" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized holding gain (loss) on available-for-sale securities arising during the period, net of tax</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Reclassification for loss realized on available-for-sale securities</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgmf_AmortizationOfPostTransferUnrealizedHoldingLossOnHeldToMaturitySecuritiesArisingDuringPeriodNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Post Transfer Unrealized Holding Loss On Held To Maturity Securities Arising During Period Net Of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income Loss Net Of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:type="locator" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total comprehensive income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax_lbl" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanAndServiceAward" xlink:type="locator" xlink:label="bkgmf_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanAndServiceAward" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanAndServiceAward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period shares employee stock purchase plan and service award.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanAndServiceAward" xlink:to="bkgmf_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlanAndServiceAward_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_StockIssuedDuringPeriodValueEmployeeStockPurchasePlanAndServiceAward" xlink:type="locator" xlink:label="bkgmf_StockIssuedDuringPeriodValueEmployeeStockPurchasePlanAndServiceAward" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_StockIssuedDuringPeriodValueEmployeeStockPurchasePlanAndServiceAward_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period value employee stock purchase plan and service award.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_StockIssuedDuringPeriodValueEmployeeStockPurchasePlanAndServiceAward" xlink:to="bkgmf_StockIssuedDuringPeriodValueEmployeeStockPurchasePlanAndServiceAward_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Of Stockholders Equity [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_StatementOfStockholdersEquityAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:type="locator" xlink:label="us-gaap_StatementTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:type="locator" xlink:label="us-gaap_StatementEquityComponentsAxis" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:type="locator" xlink:label="us-gaap_EquityComponentDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Component</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_EquityComponentDomain_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockMember" xlink:type="locator" xlink:label="us-gaap_CommonStockMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AdditionalPaidInCapitalCommonStockMember" xlink:type="locator" xlink:label="bkgmf_AdditionalPaidInCapitalCommonStockMember" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AdditionalPaidInCapitalPreferredStockMember" xlink:type="locator" xlink:label="bkgmf_AdditionalPaidInCapitalPreferredStockMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AdditionalPaidInCapitalPreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional paid in capital preferred stock.</link:label>
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    <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>
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    <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>
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    <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 (loss) on available-for-sale securities, net</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_HeldToMaturitySecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax" xlink:type="locator" xlink:label="bkgmf_HeldToMaturitySecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_HeldToMaturitySecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax" xlink:to="bkgmf_HeldToMaturitySecuritiesChangeInNetUnrealizedHoldingGainLossNetOfTax_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax" xlink:type="locator" xlink:label="bkgmf_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax" xlink:to="bkgmf_AvailableForSaleSecuritiesChangeInNetUnrealizedGainLossNetOfTax_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_SupplementalDisclosureOfCashFlowInformationAbstract" xlink:type="locator" xlink:label="bkgmf_SupplementalDisclosureOfCashFlowInformationAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_SupplementalDisclosureOfCashFlowInformationAbstract" xlink:to="bkgmf_SupplementalDisclosureOfCashFlowInformationAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Depreciation" xlink:type="locator" xlink:label="us-gaap_Depreciation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation</link:label>
    <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>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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>
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    <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/2018/elts/us-gaap-2018-01-31.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">Gain (loss) on sales of other real estate owned, net</link:label>
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    <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/2018/elts/us-gaap-2018-01-31.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>
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    <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/2018/elts/us-gaap-2018-01-31.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>
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    <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/2018/elts/us-gaap-2018-01-31.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:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfInvestments" xlink:type="locator" xlink:label="us-gaap_GainLossOnSaleOfInvestments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Realized loss on sale of available-for-sale securities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Sale Of Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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 gain 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:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" xlink:type="locator" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Income from equity investment in unconsolidated subsidiary</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" xlink:to="us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Loss From Equity Method Investments Net Of Dividends Or Distributions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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>
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    <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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:to="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" />
    <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:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" />
    <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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:to="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_lbl" />
    <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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities" xlink:type="locator" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturities, prepayments and calls of held-to-maturity securities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities" xlink:to="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromLoansAndLeases" xlink:type="locator" xlink:label="us-gaap_PaymentsForProceedsFromLoansAndLeases" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForProceedsFromLoansAndLeases_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loan originations and principal collections, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForProceedsFromLoansAndLeases" xlink:to="us-gaap_PaymentsForProceedsFromLoansAndLeases_lbl" />
    <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:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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">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/2018/elts/us-gaap-2018-01-31.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>
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    <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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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>
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    <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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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>
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    <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/2018/elts/us-gaap-2018-01-31.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 decrease in deposits</link:label>
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    <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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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>
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    <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>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocationDomain" xlink:to="dei_LocationDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_LocationDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Location [Domain]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_BankBranchMember" xlink:type="locator" xlink:label="bkgmf_BankBranchMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_BankBranchMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Bank Branch.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_BankBranchMember" xlink:to="bkgmf_BankBranchMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_BankBranchMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank Branch [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_BankBranchMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bank Branch [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionAxis" xlink:to="us-gaap_BusinessAcquisitionAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:type="locator" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition, Acquiree</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionAcquireeDomain" xlink:to="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Acquiree [Domain]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_ASCTrustCorporationMember" xlink:type="locator" xlink:label="bkgmf_ASCTrustCorporationMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_ASCTrustCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">ASC trust corporation.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_ASCTrustCorporationMember" xlink:to="bkgmf_ASCTrustCorporationMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_ASCTrustCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASC Trust Corporation [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_ASCTrustCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">A S C Trust Corporation [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:type="locator" xlink:label="srt_RangeAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Range</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Range</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeMember" xlink:to="srt_RangeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:type="locator" xlink:label="srt_MaximumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl" />
    <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/2018/elts/srt-2018-01-31.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/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:type="locator" xlink:label="us-gaap_SegmentReportingInformationLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Reporting Information [Line Items]</link:label>
    <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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_RegulatoryAssetsAbstract" xlink:type="locator" xlink:label="bkgmf_RegulatoryAssetsAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_RegulatoryAssetsAbstract" xlink:to="bkgmf_RegulatoryAssetsAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_RegulatoryAssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Assets [Abstract]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_SummaryOfSignificantAccountingPoliciesLineItems" xlink:type="locator" xlink:label="bkgmf_SummaryOfSignificantAccountingPoliciesLineItems" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_SummaryOfSignificantAccountingPoliciesLineItems" xlink:to="bkgmf_SummaryOfSignificantAccountingPoliciesLineItems_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_SummaryOfSignificantAccountingPoliciesTable" xlink:type="locator" xlink:label="bkgmf_SummaryOfSignificantAccountingPoliciesTable" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_SummaryOfSignificantAccountingPoliciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary Of Significant Accounting Policies [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis" xlink:type="locator" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Cash and Cash Equivalents</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_BankOfGuamTrustDepartmentCustomerMember" xlink:type="locator" xlink:label="bkgmf_BankOfGuamTrustDepartmentCustomerMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_BankOfGuamTrustDepartmentCustomerMember" xlink:to="bkgmf_BankOfGuamTrustDepartmentCustomerMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_BorrowerLoanProtectionProgramMember" xlink:type="locator" xlink:label="bkgmf_BorrowerLoanProtectionProgramMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_BorrowerLoanProtectionProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Borrower loan protection program.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_BorrowerLoanProtectionProgramMember" xlink:to="bkgmf_BorrowerLoanProtectionProgramMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_BorrowerLoanProtectionProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Borrower&apos;s Loan Protection Program [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_BorrowerLoanProtectionProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Borrower Loan Protection Program [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:type="locator" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:type="locator" xlink:label="us-gaap_TypeOfAdoptionMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Type of Adoption</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfAdoptionMember" xlink:to="us-gaap_TypeOfAdoptionMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Type Of Adoption [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:type="locator" xlink:label="us-gaap_AccountingStandardsUpdate201602Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201602Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASU 2016-02 [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingStandardsUpdate201602Member" xlink:to="us-gaap_AccountingStandardsUpdate201602Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201602Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update201602 [Member]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AccountingStandardsUpdate201802Member" xlink:type="locator" xlink:label="bkgmf_AccountingStandardsUpdate201802Member" />
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    <link:label xml:lang="en-US" xlink:label="bkgmf_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary Of Significant Accounting Policies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Significant Accounting Policies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositsInBanks_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest-bearing Deposits in Banks and Other Financial Institutions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease ROU assets</link:label>
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_MortgageBackedSecuritiesIssuedByGovernmentNationalMortgageAssociationGNMAMember" xlink:type="locator" xlink:label="bkgmf_MortgageBackedSecuritiesIssuedByGovernmentNationalMortgageAssociationGNMAMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_MortgageBackedSecuritiesIssuedByGovernmentNationalMortgageAssociationGNMAMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Mortgage backed securities issued by government national mortgage association GNMA.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_MortgageBackedSecuritiesIssuedByGovernmentNationalMortgageAssociationGNMAMember" xlink:to="bkgmf_MortgageBackedSecuritiesIssuedByGovernmentNationalMortgageAssociationGNMAMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_MortgageBackedSecuritiesIssuedByGovernmentNationalMortgageAssociationGNMAMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Government National Mortgage Association (GNMA) [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_MortgageBackedSecuritiesIssuedByGovernmentNationalMortgageAssociationGNMAMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Mortgage Backed Securities Issued By Government National Mortgage Association G N M A [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:type="locator" xlink:label="us-gaap_USTreasuryAndGovernmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_USTreasuryAndGovernmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">U.S. Treasuries [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_USTreasuryAndGovernmentMember" xlink:to="us-gaap_USTreasuryAndGovernmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_USTreasuryAndGovernmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">U S Treasury And Government [Member]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_UsGovernmentAgencySecuritiesIssuedByFNMAMember" xlink:type="locator" xlink:label="bkgmf_UsGovernmentAgencySecuritiesIssuedByFNMAMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_UsGovernmentAgencySecuritiesIssuedByFNMAMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Us government agencies issued by federal national mortgage association.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_UsGovernmentAgencySecuritiesIssuedByFNMAMember" xlink:to="bkgmf_UsGovernmentAgencySecuritiesIssuedByFNMAMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_UsGovernmentAgencySecuritiesIssuedByFNMAMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal National Mortgage Association (FNMA) [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_UsGovernmentAgencySecuritiesIssuedByFNMAMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Us Government Agency Securities Issued By F N M A [Member]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AgencySecurityIssuedByFederalNationalMortgageAssociationMember" xlink:type="locator" xlink:label="bkgmf_AgencySecurityIssuedByFederalNationalMortgageAssociationMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AgencySecurityIssuedByFederalNationalMortgageAssociationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Agency security issued by federal national mortgage association.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_AgencySecurityIssuedByFederalNationalMortgageAssociationMember" xlink:to="bkgmf_AgencySecurityIssuedByFederalNationalMortgageAssociationMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AgencySecurityIssuedByFederalNationalMortgageAssociationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agency Security Issued by Federal National Mortgage Association (FNMA) [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_AgencySecurityIssuedByFederalNationalMortgageAssociationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Agency Security Issued By Federal National Mortgage Association [Member]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_MortgageBackedSecuritiesIssuedByFederalHomeLoanCorporationMember" xlink:type="locator" xlink:label="bkgmf_MortgageBackedSecuritiesIssuedByFederalHomeLoanCorporationMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_MortgageBackedSecuritiesIssuedByFederalHomeLoanCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Mortgage backed securities issued by federal home loan corporation.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_MortgageBackedSecuritiesIssuedByFederalHomeLoanCorporationMember" xlink:to="bkgmf_MortgageBackedSecuritiesIssuedByFederalHomeLoanCorporationMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_MortgageBackedSecuritiesIssuedByFederalHomeLoanCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mortgage-Backed Securities Issued by Federal Home Loan Corporation (FHLMC) [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_MortgageBackedSecuritiesIssuedByFederalHomeLoanCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Mortgage Backed Securities Issued By Federal Home Loan Corporation [Member]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AgencySecuritiesIssuedByFederalHomeLoanMortgageCorporationMember" xlink:type="locator" xlink:label="bkgmf_AgencySecuritiesIssuedByFederalHomeLoanMortgageCorporationMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AgencySecuritiesIssuedByFederalHomeLoanMortgageCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Agency securities issued by federal home oan mortgage corporation.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_AgencySecuritiesIssuedByFederalHomeLoanMortgageCorporationMember" xlink:to="bkgmf_AgencySecuritiesIssuedByFederalHomeLoanMortgageCorporationMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AgencySecuritiesIssuedByFederalHomeLoanMortgageCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agency Security Issued By Federal Home Loan Corporation (FHLMC) [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_AgencySecuritiesIssuedByFederalHomeLoanMortgageCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Agency Securities Issued By Federal Home Loan Mortgage Corporation [Member]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AgencySecuritiesIssuedByFederalFarmCreditBanksMember" xlink:type="locator" xlink:label="bkgmf_AgencySecuritiesIssuedByFederalFarmCreditBanksMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AgencySecuritiesIssuedByFederalFarmCreditBanksMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Agency securities issued by Federal Farm Credit Banks.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_AgencySecuritiesIssuedByFederalFarmCreditBanksMember" xlink:to="bkgmf_AgencySecuritiesIssuedByFederalFarmCreditBanksMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AgencySecuritiesIssuedByFederalFarmCreditBanksMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agency Security Issued by Federal Farm Credit Banks (FFCB) [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_AgencySecuritiesIssuedByFederalFarmCreditBanksMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Agency Securities Issued By Federal Farm Credit Banks [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xlink:type="locator" xlink:label="us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Trading Securities And Other Trading Assets [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xlink:to="us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Trading Securities And Other Trading Assets [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged" xlink:to="us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pledged Financial Instruments Not Separately Reported Securities Pledged</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_NumberOfDebtSecuritiesSold" xlink:type="locator" xlink:label="bkgmf_NumberOfDebtSecuritiesSold" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_NumberOfDebtSecuritiesSold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of debt securities sold.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_NumberOfDebtSecuritiesSold" xlink:to="bkgmf_NumberOfDebtSecuritiesSold_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_NumberOfDebtSecuritiesSold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of debt securities sold</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_NumberOfDebtSecuritiesSold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Debt Securities Sold</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGain" xlink:type="locator" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleRealizedGain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross realized gains from sales</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtSecuritiesAvailableForSaleRealizedGain" xlink:to="us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_lbl" />
    <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/2018/elts/us-gaap-2018-01-31.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>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss" xlink:to="us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities Available For Sale Realized Loss</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_EstimatedAverageRemainingLifeSecurities" xlink:type="locator" xlink:label="bkgmf_EstimatedAverageRemainingLifeSecurities" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_EstimatedAverageRemainingLifeSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated average remaining life securities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_EstimatedAverageRemainingLifeSecurities" xlink:to="bkgmf_EstimatedAverageRemainingLifeSecurities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveVerboseLabel">Available for sale debt securities</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_EstimatedAverageRemainingLifeSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated average remaining life securities</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_EstimatedAverageRemainingLifeSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Average Remaining Life Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available for sale, Amortized cost, Due within one year</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost" xlink:to="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_lbl" />
    <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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available for sale, Amortized cost, Due after one but within five years</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost" xlink:to="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available for sale, Amortized cost, Due after five but within ten years</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost" xlink:to="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available for sale, Amortized cost, Due after ten years</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost" xlink:to="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Available For Sale Securities Debt Maturities After Ten Years Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available for sale, Estimated Fair Value, Due within one year</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:to="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Available For Sale Securities Debt Maturities Within One Year Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available for sale, Estimated Fair Value, Due after one but within five years</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue" xlink:to="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AutomobileLoanMember" xlink:type="locator" xlink:label="us-gaap_AutomobileLoanMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AutomobileLoanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Automobile [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AutomobileLoanMember" xlink:to="us-gaap_AutomobileLoanMember_lbl" />
    <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/2018/elts/us-gaap-2018-01-31.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="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_FormulaMember" xlink:type="locator" xlink:label="bkgmf_FormulaMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_FormulaMember" xlink:to="bkgmf_FormulaMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_TroubledDebtRestructuringMember" xlink:type="locator" xlink:label="bkgmf_TroubledDebtRestructuringMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TroubledDebtRestructuringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Troubled debt restructuring.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_TroubledDebtRestructuringMember" xlink:to="bkgmf_TroubledDebtRestructuringMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TroubledDebtRestructuringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Troubled Debt Restructuring [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_TroubledDebtRestructuringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Troubled Debt Restructuring [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:type="locator" xlink:label="us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank originated of mortgage 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_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:to="us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Origination Of Mortgage Loans Held For Sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInLoansHeldForSale" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInLoansHeldForSale" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Mortgage 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_IncreaseDecreaseInLoansHeldForSale" xlink:to="us-gaap_IncreaseDecreaseInLoansHeldForSale_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Loans Held For Sale</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_PercentageOfIncreaseDecreaseInFinanceReceivables" xlink:type="locator" xlink:label="bkgmf_PercentageOfIncreaseDecreaseInFinanceReceivables" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_PercentageOfIncreaseDecreaseInFinanceReceivables_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of increase decrease in finance receivables.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_PercentageOfIncreaseDecreaseInFinanceReceivables" xlink:to="bkgmf_PercentageOfIncreaseDecreaseInFinanceReceivables_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_UnpaidPrincipalBalancesOfMortgageLoansServicedForOthers" xlink:type="locator" xlink:label="bkgmf_UnpaidPrincipalBalancesOfMortgageLoansServicedForOthers" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_UnpaidPrincipalBalancesOfMortgageLoansServicedForOthers" xlink:to="bkgmf_UnpaidPrincipalBalancesOfMortgageLoansServicedForOthers_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrincipalAmountOutstandingOnLoansHeldForSaleOrSecuritization" xlink:type="locator" xlink:label="us-gaap_PrincipalAmountOutstandingOnLoansHeldForSaleOrSecuritization" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrincipalAmountOutstandingOnLoansHeldForSaleOrSecuritization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mortgage loan payment of principal</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrincipalAmountOutstandingOnLoansHeldForSaleOrSecuritization" xlink:to="us-gaap_PrincipalAmountOutstandingOnLoansHeldForSaleOrSecuritization_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrincipalAmountOutstandingOnLoansHeldForSaleOrSecuritization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Principal Amount Outstanding On Loans Held For Sale Or Securitization</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_PercentageOfIncreaseDecreaseInFinanceReceivables_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase (Decrease) percentage of gross loan</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_PercentageOfIncreaseDecreaseInFinanceReceivables_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Increase Decrease In Finance Receivables</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ServicingAssetAtFairValueAmount" xlink:type="locator" xlink:label="us-gaap_ServicingAssetAtFairValueAmount" />
    <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="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_PercentageOfLoanAggregateLoanPortfolio" xlink:type="locator" xlink:label="bkgmf_PercentageOfLoanAggregateLoanPortfolio" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_PercentageOfLoanAggregateLoanPortfolio" xlink:to="bkgmf_PercentageOfLoanAggregateLoanPortfolio_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_PercentageOfLoanOnCommercialLoanPortfolio" xlink:type="locator" xlink:label="bkgmf_PercentageOfLoanOnCommercialLoanPortfolio" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_PercentageOfLoanOnCommercialLoanPortfolio" xlink:to="bkgmf_PercentageOfLoanOnCommercialLoanPortfolio_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_PercentageOfLoanOnConsumerLoanPortfolio" xlink:type="locator" xlink:label="bkgmf_PercentageOfLoanOnConsumerLoanPortfolio" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_PercentageOfLoanOnConsumerLoanPortfolio" xlink:to="bkgmf_PercentageOfLoanOnConsumerLoanPortfolio_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_CommercialAgriculturePortfolioSegmentMember" xlink:type="locator" xlink:label="bkgmf_CommercialAgriculturePortfolioSegmentMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_CommercialAgriculturePortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial agriculture portfolio segment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_CommercialAgriculturePortfolioSegmentMember" xlink:to="bkgmf_CommercialAgriculturePortfolioSegmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_CommercialAgriculturePortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial Agriculture [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_CommercialAgriculturePortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Agriculture Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk" xlink:type="locator" xlink:label="bkgmf_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk" xlink:to="bkgmf_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts" xlink:type="locator" xlink:label="bkgmf_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts" xlink:to="bkgmf_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts_lbl" />
    <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, beginning of period</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for loan losses</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_AllowanceForLoanAndLeaseLossRecoveryOfProvisionForBadDebts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Recoveries on loans previously charged off</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_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:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/negatedTerseLabel">Charged off loans</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="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance, end of period</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_RecordedInvestmentInLoansAndLeasesAbstract" xlink:type="locator" xlink:label="bkgmf_RecordedInvestmentInLoansAndLeasesAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_RecordedInvestmentInLoansAndLeasesAbstract" xlink:to="bkgmf_RecordedInvestmentInLoansAndLeasesAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_ResidentialMortgageAndHomeEquityMember" xlink:type="locator" xlink:label="bkgmf_ResidentialMortgageAndHomeEquityMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_ResidentialMortgageAndHomeEquityMember" xlink:to="bkgmf_ResidentialMortgageAndHomeEquityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_ConsumerPortfolioOtherThanResidentialMortgagesMember" xlink:type="locator" xlink:label="bkgmf_ConsumerPortfolioOtherThanResidentialMortgagesMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_ConsumerPortfolioOtherThanResidentialMortgagesMember" xlink:to="bkgmf_ConsumerPortfolioOtherThanResidentialMortgagesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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_AllowanceForLoanAndLeaseLossesWriteOffs_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Charge-offs</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_ProvisionForLoanAndLeaseLossesExcludingReserveForOffBalanceSheetRisk_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Provision</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_AllowanceForLoansAndLeaseLossesProvisionForLossNetAbstract" xlink:type="locator" xlink:label="bkgmf_AllowanceForLoansAndLeaseLossesProvisionForLossNetAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_AllowanceForLoansAndLeaseLossesProvisionForLossNetAbstract" xlink:to="bkgmf_AllowanceForLoansAndLeaseLossesProvisionForLossNetAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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/2018/elts/us-gaap-2018-01-31.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>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFinancingReceivablesPastDueTable" xlink:to="us-gaap_ScheduleOfFinancingReceivablesPastDueTable_lbl" />
    <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/2018/elts/us-gaap-2018-01-31.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">Financing Receivables, Period Past Due</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivablesPeriodPastDueAxis" xlink:to="us-gaap_FinancingReceivablesPeriodPastDueAxis_lbl" />
    <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/2018/elts/us-gaap-2018-01-31.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">Financing Receivables, Period Past Due</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivablesPeriodPastDueDomain" xlink:to="us-gaap_FinancingReceivablesPeriodPastDueDomain_lbl" />
    <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/2018/elts/us-gaap-2018-01-31.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>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivables30To59DaysPastDueMember" xlink:to="us-gaap_FinancingReceivables30To59DaysPastDueMember_lbl" />
    <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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember" xlink:type="locator" xlink:label="bkgmf_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember" xlink:to="bkgmf_FinancingReceivablesEqualToGreaterThan90DaysPastDueNonAccrualMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember" xlink:type="locator" xlink:label="bkgmf_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember" xlink:to="bkgmf_FinancingReceivablesEqualToGreaterThan90DaysPastDueStillAccruingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_AccrualOfInterestPaymentsOnLoan" xlink:type="locator" xlink:label="bkgmf_AccrualOfInterestPaymentsOnLoan" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_AccrualOfInterestPaymentsOnLoan" xlink:to="bkgmf_AccrualOfInterestPaymentsOnLoan_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_NonaccrualStatusChargedOffOnLoan" xlink:type="locator" xlink:label="bkgmf_NonaccrualStatusChargedOffOnLoan" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_NonaccrualStatusChargedOffOnLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Nonaccrual status charged off on loan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_NonaccrualStatusChargedOffOnLoan" xlink:to="bkgmf_NonaccrualStatusChargedOffOnLoan_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_AccrualOfInterestPaymentsOnLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrual Of Interest Payments On Loan</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_NonaccrualStatusChargedOffOnLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nonaccrual status, charged off on loan</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_NonaccrualStatusChargedOffOnLoan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Nonaccrual Status Charged Off On Loan</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_LoanCollateralized" xlink:type="locator" xlink:label="bkgmf_LoanCollateralized" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_LoanCollateralized" xlink:to="bkgmf_LoanCollateralized_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_LoanCollateralized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loan Collateralized</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AllLoansAndCreditCardsDelinquent" xlink:type="locator" xlink:label="bkgmf_AllLoansAndCreditCardsDelinquent" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_AllLoansAndCreditCardsDelinquent" xlink:to="bkgmf_AllLoansAndCreditCardsDelinquent_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_RealEstateLoansDelinquent" xlink:type="locator" xlink:label="bkgmf_RealEstateLoansDelinquent" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_RealEstateLoansDelinquent" xlink:to="bkgmf_RealEstateLoansDelinquent_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_DelinquentRealEstateLoansForeclosureCompletionPeriod" xlink:type="locator" xlink:label="bkgmf_DelinquentRealEstateLoansForeclosureCompletionPeriod" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_DelinquentRealEstateLoansForeclosureCompletionPeriod" xlink:to="bkgmf_DelinquentRealEstateLoansForeclosureCompletionPeriod_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_PeriodForLoansDelinquentUnderFormulaCategory" xlink:type="locator" xlink:label="bkgmf_PeriodForLoansDelinquentUnderFormulaCategory" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_PeriodForLoansDelinquentUnderFormulaCategory" xlink:to="bkgmf_PeriodForLoansDelinquentUnderFormulaCategory_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_MaximumValueOfCommercialLoansConsideredToIncludeInMonthlyFormulaClassifiedLoans" xlink:type="locator" xlink:label="bkgmf_MaximumValueOfCommercialLoansConsideredToIncludeInMonthlyFormulaClassifiedLoans" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_MaximumValueOfCommercialLoansConsideredToIncludeInMonthlyFormulaClassifiedLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum value of commercial loans considered to include in monthly formula classified loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_MaximumValueOfCommercialLoansConsideredToIncludeInMonthlyFormulaClassifiedLoans" xlink:to="bkgmf_MaximumValueOfCommercialLoansConsideredToIncludeInMonthlyFormulaClassifiedLoans_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_PeriodForLoansDelinquentUnderFormulaCategory_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Period For Loans Delinquent Under Formula Category</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_MaximumValueOfCommercialLoansConsideredToIncludeInMonthlyFormulaClassifiedLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum value of commercial loans considered to include in monthly formula total</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_MaximumValueOfCommercialLoansConsideredToIncludeInMonthlyFormulaClassifiedLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Value Of Commercial Loans Considered To Include In Monthly Formula Classified Loans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_LoansAndLeasesReceivableAdditionalDisbursements" xlink:type="locator" xlink:label="bkgmf_LoansAndLeasesReceivableAdditionalDisbursements" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_LoansAndLeasesReceivableAdditionalDisbursements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loans and leases receivable additional disbursements.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_LoansAndLeasesReceivableAdditionalDisbursements" xlink:to="bkgmf_LoansAndLeasesReceivableAdditionalDisbursements_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_LoansAndLeasesReceivableAdditionalDisbursements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans additional disbursements</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_LoansAndLeasesReceivableAdditionalDisbursements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Additional Disbursements</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToUpgradeOfLoanRelationship" xlink:type="locator" xlink:label="bkgmf_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToUpgradeOfLoanRelationship" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToUpgradeOfLoanRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Transfer of finance receivables from special mention to category due to upgrade of loan relationship.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToUpgradeOfLoanRelationship" xlink:to="bkgmf_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToUpgradeOfLoanRelationship_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_FinanceReceivablePayOffDueToChangeInCategoryRelationship" xlink:type="locator" xlink:label="bkgmf_FinanceReceivablePayOffDueToChangeInCategoryRelationship" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_FinanceReceivablePayOffDueToChangeInCategoryRelationship" xlink:to="bkgmf_FinanceReceivablePayOffDueToChangeInCategoryRelationship_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToUpgradeOfLoanRelationship_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="bkgmf_TransferOfFinanceReceivablesFromSpecialMentionToCategoryDueToUpgradeOfLoanRelationship_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transfer Of Finance Receivables From Special Mention To Category Due To Upgrade Of Loan Relationship</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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:loc xlink:href="bkgmf-20190630.xsd#bkgmf_TransferOfFinanceReceivablesFromSubstandardCategoryDueToReclassification" xlink:type="locator" xlink:label="bkgmf_TransferOfFinanceReceivablesFromSubstandardCategoryDueToReclassification" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TransferOfFinanceReceivablesFromSubstandardCategoryDueToReclassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Transfer Of finance receivables from substandard category due to reclassification.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_TransferOfFinanceReceivablesFromSubstandardCategoryDueToReclassification" xlink:to="bkgmf_TransferOfFinanceReceivablesFromSubstandardCategoryDueToReclassification_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TransferOfFinanceReceivablesFromSubstandardCategoryDueToReclassification_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="bkgmf_TransferOfFinanceReceivablesFromSubstandardCategoryDueToReclassification_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transfer Of Finance Receivables From Substandard Category Due To Reclassification</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification" xlink:type="locator" xlink:label="bkgmf_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification" xlink:to="bkgmf_TransferOfFinanceReceivablesFromDoubtfulCategoryDueToReclassification_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_TroubledDebtRestructuringsAbstract" xlink:type="locator" xlink:label="bkgmf_TroubledDebtRestructuringsAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_TroubledDebtRestructuringsAbstract" xlink:to="bkgmf_TroubledDebtRestructuringsAbstract_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring" xlink:type="locator" xlink:label="bkgmf_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring" xlink:to="bkgmf_FinancingReceivablesImpairedNonAccruingTroubledDebtRestructuring_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring" xlink:type="locator" xlink:label="bkgmf_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring" xlink:to="bkgmf_FinancingReceivablesImpairedAccruingTroubledDebtRestructuring_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans" xlink:type="locator" xlink:label="bkgmf_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans" xlink:to="bkgmf_ImpairedLoansLessThanNinetyDaysDelinquentAndIncludedInImpairedLoans_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf_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="bkgmf_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="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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 Construction [Member]</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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod_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:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod" xlink:to="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod" xlink:type="locator" xlink:label="bkgmf_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod" xlink:to="bkgmf_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeExpenseAndUnearnedDiscountAccrualMethod_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance" />
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    <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/2018/elts/us-gaap-2018-01-31.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="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_FinancingReceivablePrincipalModificationRecordedInvestment" xlink:type="locator" xlink:label="bkgmf_FinancingReceivablePrincipalModificationRecordedInvestment" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_FinancingReceivablePrincipalModificationRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing receivable principal modification recorded investment.</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of contractual interest rate for loan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Rate Stated Percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsNumberOfContracts2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of loans modified as troubled debt restructuring</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TroubledDebtRestructuringDebtorOther" xlink:type="locator" xlink:label="us-gaap_TroubledDebtRestructuringDebtorOther" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TroubledDebtRestructuringDebtorOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Defaults troubled debt restructuring</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TroubledDebtRestructuringDebtorOther" xlink:to="us-gaap_TroubledDebtRestructuringDebtorOther_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TroubledDebtRestructuringDebtorOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Troubled Debt Restructuring Debtor Other</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AllowanceForLoanAndLeaseLossesElevatedRiskInLoanRelationshipWarrantedAmount" xlink:type="locator" xlink:label="bkgmf_AllowanceForLoanAndLeaseLossesElevatedRiskInLoanRelationshipWarrantedAmount" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AllowanceForLoanAndLeaseLossesElevatedRiskInLoanRelationshipWarrantedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for loan and lease losses, elevated risk in loan relationship warranted amount.</link:label>
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AllowanceForLoanAndLeaseLossesStateLoanGuarantee" xlink:type="locator" xlink:label="bkgmf_AllowanceForLoanAndLeaseLossesStateLoanGuarantee" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AllowanceForLoanAndLeaseLossesStateLoanGuarantee_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for loan and lease losses, state loan guarantee.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_AllowanceForLoanAndLeaseLossesStateLoanGuarantee" xlink:to="bkgmf_AllowanceForLoanAndLeaseLossesStateLoanGuarantee_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AllowanceForLoanAndLeaseLossesSpecificReserve" xlink:type="locator" xlink:label="bkgmf_AllowanceForLoanAndLeaseLossesSpecificReserve" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_AllowanceForLoanAndLeaseLossesSpecificReserve" xlink:to="bkgmf_AllowanceForLoanAndLeaseLossesSpecificReserve_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AllowanceForLoanAndLeaseLossesElevatedRiskInLoanRelationshipWarrantedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Elevated risk in one loan relationship warranted amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_AllowanceForLoanAndLeaseLossesElevatedRiskInLoanRelationshipWarrantedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Loan And Lease Losses Elevated Risk In Loan Relationship Warranted Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collateral amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings" xlink:to="us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableCollateralForSecuredBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Collateral For Secured Borrowings</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_AllowanceForLoanAndLeaseLossesStateLoanGuarantee_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State loan guarantee</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_AllowanceForLoanAndLeaseLossesStateLoanGuarantee_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Loan And Lease Losses State Loan Guarantee</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_TierOneCommonEquityToRiskWeightedAssetsMinimum" xlink:type="locator" xlink:label="bkgmf_TierOneCommonEquityToRiskWeightedAssetsMinimum" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_TierOneCommonEquityToRiskWeightedAssetsMinimum" xlink:to="bkgmf_TierOneCommonEquityToRiskWeightedAssetsMinimum_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_MinimumNonRiskBasedLeverageRatio" xlink:type="locator" xlink:label="bkgmf_MinimumNonRiskBasedLeverageRatio" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_MinimumNonRiskBasedLeverageRatio" xlink:to="bkgmf_MinimumNonRiskBasedLeverageRatio_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_MinimumNonRiskBasedLeverageRatioForHigherRatedBank" xlink:type="locator" xlink:label="bkgmf_MinimumNonRiskBasedLeverageRatioForHigherRatedBank" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_MinimumNonRiskBasedLeverageRatioForHigherRatedBank" xlink:to="bkgmf_MinimumNonRiskBasedLeverageRatioForHigherRatedBank_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_CapitalConservationBuffer" xlink:type="locator" xlink:label="bkgmf_CapitalConservationBuffer" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_CapitalConservationBuffer" xlink:to="bkgmf_CapitalConservationBuffer_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_CapitalConservationBufferPhaseInAmount" xlink:type="locator" xlink:label="bkgmf_CapitalConservationBufferPhaseInAmount" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_CapitalConservationBufferPhaseInAmount" xlink:to="bkgmf_CapitalConservationBufferPhaseInAmount_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure" xlink:type="locator" xlink:label="bkgmf_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure" xlink:to="bkgmf_NumberOfPeriodAssignedForNonAccrualStatusForHigherRiskWeightingToExposure_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue" xlink:type="locator" xlink:label="bkgmf_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue" xlink:to="bkgmf_PermittedCompositionForTierOneCapitalConsolidatedAssetsValue_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_PermittedCompositionForTierOneCapitalForeignExposures" xlink:type="locator" xlink:label="bkgmf_PermittedCompositionForTierOneCapitalForeignExposures" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_PermittedCompositionForTierOneCapitalForeignExposures" xlink:to="bkgmf_PermittedCompositionForTierOneCapitalForeignExposures_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_BaselThreeMember" xlink:type="locator" xlink:label="bkgmf_BaselThreeMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_BaselThreeMember" xlink:to="bkgmf_BaselThreeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_BaselThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Basel Three [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanNameAxis" xlink:type="locator" xlink:label="us-gaap_PlanNameAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PlanNameDomain" xlink:type="locator" xlink:label="us-gaap_PlanNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameDomain" xlink:to="us-gaap_PlanNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_TwoThousandElevenPlanMember" xlink:type="locator" xlink:label="bkgmf_TwoThousandElevenPlanMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TwoThousandElevenPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand eleven plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_TwoThousandElevenPlanMember" xlink:to="bkgmf_TwoThousandElevenPlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TwoThousandElevenPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Two Thousand Eleven Plan [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_TwoThousandElevenPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Eleven Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:type="locator" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_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_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SubsidiarySaleOfStockAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiary Sale Of Stock [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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">Non-Voting 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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:type="locator" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Three-month LIBOR [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:to="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">London Interbank Offered Rate L I B O R [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_TierOneCommonEquityCapital" xlink:type="locator" xlink:label="bkgmf_TierOneCommonEquityCapital" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common equity capital.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_TierOneCommonEquityCapital" xlink:to="bkgmf_TierOneCommonEquityCapital_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapital" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapital" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital (to Average Assets), Actual, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapital" xlink:to="us-gaap_TierOneLeverageCapital_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual, Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Common Equity Capital</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_TierOneCommonEquityToRiskWeightedAssets" xlink:type="locator" xlink:label="bkgmf_TierOneCommonEquityToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common equity to risk weighted assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_TierOneCommonEquityToRiskWeightedAssets" xlink:to="bkgmf_TierOneCommonEquityToRiskWeightedAssets_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_CapitalToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital (to Risk Weighted Assets), Actual, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalToRiskWeightedAssets" xlink:to="us-gaap_CapitalToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital (to Risk Weighted Assets), Actual, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets" xlink:to="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapitalToAverageAssets" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalToAverageAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital (to Average Assets), Actual, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalToAverageAssets" xlink:to="us-gaap_TierOneLeverageCapitalToAverageAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital To Average Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Common Equity To Risk Weighted Assets</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_TierOneCommonEquityRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common equity required for capital adequacy.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacy" xlink:to="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacy_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalRequiredForCapitalAdequacy" xlink:to="us-gaap_CapitalRequiredForCapitalAdequacy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required For Capital Adequacy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required For Capital Adequacy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital (to Average Assets), For Capital Adequacy Purposes, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy" xlink:to="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required For Capital Adequacy</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Common Equity Required For Capital Adequacy</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_TierOneCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:type="locator" xlink:label="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common equity required for capital adequacy to risk weighted assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:to="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Ratio</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required For Capital Adequacy To Risk Weighted Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Ratio</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital (to Average Assets), For Capital Adequacy Purposes, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets" xlink:to="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required For Capital Adequacy To Average Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Equity Tier 1 Capital (to Risk Weighted Assets), For Capital Adequacy Purposes, Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Common Equity Required For Capital Adequacy To Risk Weighted Assets</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_TierOneCommonEquityCapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="bkgmf_TierOneCommonEquityCapitalRequiredToBeWellCapitalized" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_TierOneCommonEquityCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common equity capital required to be well capitalized.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_TierOneCommonEquityCapitalRequiredToBeWellCapitalized" xlink:to="bkgmf_TierOneCommonEquityCapitalRequiredToBeWellCapitalized_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalized" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:to="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required To Be Well Capitalized To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital (to Risk Weighted Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 capital (to Average Assets), To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets" xlink:to="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required To Be Well Capitalized To Average Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumAmount" xlink:type="locator" xlink:label="bkgmf_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumAmount" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment right to purchase stock to maximum amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumAmount" xlink:to="bkgmf_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumAmount_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumShares" xlink:type="locator" xlink:label="bkgmf_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumShares" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment right to purchase stock to maximum shares.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumShares" xlink:to="bkgmf_ShareBasedCompensationArrangementByShareBasedPaymentRightToPurchaseStockToMaximumShares_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_FixedToFloatingRateConversionDate" xlink:type="locator" xlink:label="bkgmf_FixedToFloatingRateConversionDate" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_FixedToFloatingRateConversionDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fixed to floating rate conversion date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_FixedToFloatingRateConversionDate" xlink:to="bkgmf_FixedToFloatingRateConversionDate_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_PreferredStockBasisSpreadOnDividendRatePercentage" xlink:type="locator" xlink:label="bkgmf_PreferredStockBasisSpreadOnDividendRatePercentage" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_PreferredStockBasisSpreadOnDividendRatePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Preferred stock basis spread on dividend rate percentage.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_PreferredStockBasisSpreadOnDividendRatePercentage" xlink:to="bkgmf_PreferredStockBasisSpreadOnDividendRatePercentage_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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>
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    <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:label xml:lang="en-US" xlink:label="bkgmf_FixedToFloatingRateConversionDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fixed to floating rate conversion date</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_FixedToFloatingRateConversionDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fixed To Floating Rate Conversion Date</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_PreferredStockBasisSpreadOnDividendRatePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock yield percentage spread on variable rate basis</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_PreferredStockBasisSpreadOnDividendRatePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Basis Spread On Dividend Rate Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockLiquidationPreference" xlink:type="locator" xlink:label="us-gaap_PreferredStockLiquidationPreference" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockLiquidationPreference_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, liquidation preference per share</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockLiquidationPreference" xlink:to="us-gaap_PreferredStockLiquidationPreference_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockLiquidationPreference_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Liquidation Preference</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_LossContingenciesTable" xlink:to="us-gaap_LossContingenciesTable_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:type="locator" xlink:label="us-gaap_CreditFacilityAxis" />
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    <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>
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    <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>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:type="locator" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis" />
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    <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>
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    <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>
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_CommercialLettersOfCreditMember" xlink:type="locator" xlink:label="bkgmf_CommercialLettersOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_CommercialLettersOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial letters of credit.</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgmf_CommercialLettersOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Letters Of Credit [Member]</link:label>
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    <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>
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_LettersOfCreditExpirationDateMaximum" xlink:type="locator" xlink:label="bkgmf_LettersOfCreditExpirationDateMaximum" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" />
    <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>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" />
    <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>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements Fair Value Hierarchy [Domain]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel3Member" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_USTreasuryNotesAndBondsMember" xlink:type="locator" xlink:label="bkgmf_USTreasuryNotesAndBondsMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AlternativeInvestmentMeasurementInput" xlink:type="locator" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AlternativeInvestmentMeasurementInput" xlink:to="us-gaap_AlternativeInvestmentMeasurementInput_lbl" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_FairValueMeasurementsUnobservableInputs" xlink:type="locator" xlink:label="bkgmf_FairValueMeasurementsUnobservableInputs" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_FairValueMeasurementsUnobservableInputs" xlink:to="bkgmf_FairValueMeasurementsUnobservableInputs_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial instrument fair value, measurement with unobservable inputs reconciliation, recurring basis</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AlternativeInvestmentValuationTechniqueExtensibleList" xlink:type="locator" xlink:label="us-gaap_AlternativeInvestmentValuationTechniqueExtensibleList" />
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    <link:label xml:lang="en-US" xlink:label="bkgmf_FairValueMeasurementsUnobservableInputs_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements Unobservable Inputs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeAssetMeasurementInput" xlink:type="locator" xlink:label="us-gaap_DerivativeAssetMeasurementInput" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeAssetMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssetMeasurementInput" xlink:to="us-gaap_DerivativeAssetMeasurementInput_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeAssetMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset Measurement Input</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfers in or out of the Bank&apos;s Level 3 financial instruments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsNonrecurringMember" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsNonrecurringMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsNonrecurringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value on Nonrecurring Basis [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsNonrecurringMember" xlink:to="us-gaap_FairValueMeasurementsNonrecurringMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsNonrecurringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements Nonrecurring [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:type="locator" xlink:label="us-gaap_FairValueByAssetClassAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueByAssetClassAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value By Asset Class [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableMember" xlink:type="locator" xlink:label="us-gaap_LoansReceivableMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impaired Loans [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansReceivableMember" xlink:to="us-gaap_LoansReceivableMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Receivable [Member]</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_OtherRealEstateOwnedMember" xlink:type="locator" xlink:label="bkgmf_OtherRealEstateOwnedMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_OtherRealEstateOwnedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other real estate owned.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_OtherRealEstateOwnedMember" xlink:to="bkgmf_OtherRealEstateOwnedMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_OtherRealEstateOwnedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Real Estate Owned [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_OtherRealEstateOwnedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Real Estate Owned [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_AssetsFairValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total assets</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Fair Value Disclosure</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_ChangeInFairValueNonFinancialAssetsLiabilities" xlink:type="locator" xlink:label="bkgmf_ChangeInFairValueNonFinancialAssetsLiabilities" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_ChangeInFairValueNonFinancialAssetsLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in fair value non financial assets liabilities.</link:label>
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    <link:label xml:lang="en-US" xlink:label="bkgmf_ChangeInFairValueNonFinancialAssetsLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nonfinancial assets or liabilities for which a nonrecurring change in fair value</link:label>
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_FederalFundsPurchasedAndFHLBAdvancesToBeTreatedAsShortTermBorrowingsMaturityPeriod" xlink:type="locator" xlink:label="bkgmf_FederalFundsPurchasedAndFHLBAdvancesToBeTreatedAsShortTermBorrowingsMaturityPeriod" />
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_AssetsCarryingValueDisclosure" xlink:type="locator" xlink:label="bkgmf_AssetsCarryingValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_AssetsCarryingValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Assets carrying value disclosure.</link:label>
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    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_LiabilitiesCarryingValueDisclosure" xlink:type="locator" xlink:label="bkgmf_LiabilitiesCarryingValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_LiabilitiesCarryingValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Liabilities carrying value disclosure.</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:type="locator" xlink:label="us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial assets:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents, Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restricted cash, Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Federal Home Loan Bank stock, Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_HeldToMaturitySecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveTerseLabel">Investment securities held to maturity, Carrying Amount</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/positiveTerseLabel">Loans, Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_AssetsCarryingValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total financial assets, Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_AssetsCarryingValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Carrying Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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:label xml:lang="en-US" xlink:label="us-gaap_Deposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits, Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_LiabilitiesCarryingValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total financial liabilities, Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_LiabilitiesCarryingValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities Carrying Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents, Estimated fair value</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash And Cash Equivalents Fair Value Disclosure</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_RestrictedCashAndCashEquivalentsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash, Estimated fair value</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_RestrictedCashAndCashEquivalentsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash And Cash Equivalents Fair Value Disclosure</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_FederalHomeLoanBankStockFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Home Loan Bank stock, Estimated fair value</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_FederalHomeLoanBankStockFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Stock Fair Value Disclosure</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_HeldToMaturitySecuritiesFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment securities held-to-maturity, Estimated fair value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_LoansReceivableFairValueDisclosure" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansReceivableFairValueDisclosure" xlink:to="us-gaap_LoansReceivableFairValueDisclosure_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansReceivableFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Receivable Fair Value Disclosure</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total financial assets, Estimated fair value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositsFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_DepositsFairValueDisclosure" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositsFairValueDisclosure" xlink:to="us-gaap_DepositsFairValueDisclosure_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposits Fair Value Disclosure</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total financial liabilities, Estimated fair value</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_OtherComprehensiveIncomeLossFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax" xlink:type="locator" xlink:label="bkgmf_OtherComprehensiveIncomeLossFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_OtherComprehensiveIncomeLossFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other comprehensive income loss from held to maturity to available for sale securities net of tax.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="bkgmf_OtherComprehensiveIncomeLossFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax" xlink:to="bkgmf_OtherComprehensiveIncomeLossFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net unrealized loss on 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_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:to="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amounts reclassified from AOCI for loss on sale of investment securities available-for-sale included in net income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Tax effect</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax" xlink:to="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Unrealized holding loss on available-for-sale securities, net of tax</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForHeldToMaturityTransferredToAvailableForSaleSecuritiesBeforeTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForHeldToMaturityTransferredToAvailableForSaleSecuritiesBeforeTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForHeldToMaturityTransferredToAvailableForSaleSecuritiesBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross unrealized holding loss on held-to-maturity securities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForHeldToMaturityTransferredToAvailableForSaleSecuritiesBeforeTax" xlink:to="us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForHeldToMaturityTransferredToAvailableForSaleSecuritiesBeforeTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForHeldToMaturityTransferredToAvailableForSaleSecuritiesBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income Reclassification Adjustment For Held To Maturity Transferred To Available For Sale Securities Before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax" xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of unrealized holding loss on held-to-maturity during the period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossTransfersFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income Loss Transfers From Held To Maturity To Available For Sale Securities Net Of Tax</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_OtherComprehensiveIncomeLossFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Unrealized holding loss on held-to-maturity securities</link:label>
    <link:label xml:lang="en-US" xlink:label="bkgmf_OtherComprehensiveIncomeLossFromHeldToMaturityToAvailableForSaleSecuritiesNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income Loss From Held To Maturity To Available For Sale Securities Net Of Tax</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_LeaseLineItems" xlink:type="locator" xlink:label="bkgmf_LeaseLineItems" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_LeaseLineItems" xlink:to="bkgmf_LeaseLineItems_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_LeaseTable" xlink:type="locator" xlink:label="bkgmf_LeaseTable" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_LeaseTable" xlink:to="bkgmf_LeaseTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_LeaseTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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>
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    <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="bkgmf-20190630.xsd#bkgmf_BankFacilityLeaseMember" xlink:type="locator" xlink:label="bkgmf_BankFacilityLeaseMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_BankFacilityLeaseMember" xlink:to="bkgmf_BankFacilityLeaseMember_lbl" />
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    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseOptionToExtend" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend" />
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    <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/2018/elts/us-gaap-2018-01-31.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>
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    <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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseRenewalTerm" />
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    <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/2018/elts/us-gaap-2018-01-31.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>
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    <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/2018/elts/us-gaap-2018-01-31.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>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear" xlink:type="locator" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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, 2020</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="bkgmf-20190630.xsd#bkgmf_LeaseAsset" xlink:type="locator" xlink:label="bkgmf_LeaseAsset" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_LeaseAsset" xlink:to="bkgmf_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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_LeaseLiabilityPaymentsDue" xlink:type="locator" xlink:label="bkgmf_LeaseLiabilityPaymentsDue" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_LeaseLiabilityPaymentsDue" xlink:to="bkgmf_LeaseLiabilityPaymentsDue_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance Leases</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract" xlink:to="us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liabilities Payments Due [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance Leases, 2020</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability Payments Due Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance Leases, 2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability Payments Due Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance Leases, 2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability Payments Due Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance Leases, 2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability Payments Due Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance Leases, 2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability Payments Due Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance Leases, After 2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability Payments Due After Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Finance 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_FinanceLeaseLiabilityPaymentsDue" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsDue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability Payments Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance Leases, Less: Interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount" xlink:to="us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability Undiscounted Excess Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLeaseLiability" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance Leases, Present value of lease liabilities (c)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiability" xlink:to="us-gaap_FinanceLeaseLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Liability</link:label>
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_LeaseLiabilitiesPaymentsDueAbstract" xlink:type="locator" xlink:label="bkgmf_LeaseLiabilitiesPaymentsDueAbstract" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_LeaseLiabilitiesPaymentsDueAbstract" xlink:to="bkgmf_LeaseLiabilitiesPaymentsDueAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_OperatingLeasePaymentsRelatedToOptionsToExtendLease" xlink:type="locator" xlink:label="bkgmf_OperatingLeasePaymentsRelatedToOptionsToExtendLease" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_OperatingLeasePaymentsRelatedToOptionsToExtendLease" xlink:to="bkgmf_OperatingLeasePaymentsRelatedToOptionsToExtendLease_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage" xlink:type="locator" xlink:label="bkgmf_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage" xlink:to="bkgmf_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_RevenueRecognitionLineItems" xlink:type="locator" xlink:label="bkgmf_RevenueRecognitionLineItems" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_RevenueRecognitionLineItems" xlink:to="bkgmf_RevenueRecognitionLineItems_lbl" />
    <link:loc xlink:href="bkgmf-20190630.xsd#bkgmf_RevenueRecognitionTable" xlink:type="locator" xlink:label="bkgmf_RevenueRecognitionTable" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_RevenueRecognitionTable" xlink:to="bkgmf_RevenueRecognitionTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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/2018/elts/srt-2018-01-31.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/2018/elts/srt-2018-01-31.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="bkgmf-20190630.xsd#bkgmf_ServiceChargesOnDepositAccountsMember" xlink:type="locator" xlink:label="bkgmf_ServiceChargesOnDepositAccountsMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_ServiceChargesOnDepositAccountsMember" xlink:to="bkgmf_ServiceChargesOnDepositAccountsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf-20190630.xsd#bkgmf_OnlineFeesMember" xlink:type="locator" xlink:label="bkgmf_OnlineFeesMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_OnlineFeesMember" xlink:to="bkgmf_OnlineFeesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubordinatedDebtMember" xlink:type="locator" xlink:label="us-gaap_SubordinatedDebtMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubordinatedDebtMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated Notes [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubordinatedDebtMember" xlink:to="us-gaap_SubordinatedDebtMember_lbl" />
    <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="bkgmf-20190630.xsd#bkgmf_ThreeMonthLIBORMember" xlink:type="locator" xlink:label="bkgmf_ThreeMonthLIBORMember" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_ThreeMonthLIBORMember" xlink:to="bkgmf_ThreeMonthLIBORMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="bkgmf_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="bkgmf_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/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
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