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ADVANCES FROM FEDERAL HOME LOAN BANK (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Advances from Federal Home Loan Banks	$ 0	$ 0
Federal Home Loan Bank of Des Moines
Long-term line of credit		$ 0

X

- Definition

Amount of Overnight advances from the Federal Home Loan Bank (FHLB).

+ References

No definition available.

+ Details

Name:	gsbc_FederalHomeLoanBankAdvanceBranchOfFhlbBankAmountOfOvernightAdvance
Namespace Prefix:	gsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

+ Details

Name:	us-gaap_AdvancesFromFederalHomeLoanBanks
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	srt_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis=srt_FederalHomeLoanBankOfDesMoinesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: