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  <xs:element name="VanguardTargetRetirementIncomeInvMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gcbc_VanguardTargetRetirementIncomeInvMember"/>
  <xs:element name="VanguardValueIndexAdmMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gcbc_VanguardValueIndexAdmMember"/>
  <xs:element name="EmployeeBenefitPlanPlanTerminationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gcbc_EmployeeBenefitPlanPlanTerminationAbstract"/>
  <xs:element name="EmployeeBenefitPlanPlanTerminationLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gcbc_EmployeeBenefitPlanPlanTerminationLineItems"/>
  <xs:element name="EmployeeBenefitPlanPlanTerminationTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="gcbc_EmployeeBenefitPlanPlanTerminationTable"/>
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  <xs:element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="gcbc_DocumentAndEntityInformationAbstract"/>
</xs:schema>
