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v3.22.4

Other Real Estate Owned and Repossessions (Details) | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) property | Dec. 31, 2021 USD ($) property | Dec. 31, 2020 USD ($)
Valuation write-downs | $ 23,000 | $ 211,000 | $ 1,320,000
Former branch |  |  |
Number of real estate properties | property | 2 | 4 |
Amount of one former branch location | $ 0 | $ 1,200,000 |
Valuation write-downs | 0 | 0 |
Residential mortgage |  |  |
Mortgage loans in process of foreclosure, amount | $ 173,000 | $ 125,000 |

X
- Definition Represents the monetary amount of one former branch location, during the indicated time period. + References No definition available. + Details
Name: | gsbc_AmountOfOneFormerBranchLocation
Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the monetary amount of Valuation write-downs on foreclosed assets, during the indicated time period. + References No definition available. + Details
Name: | gsbc_ValuationWriteDownsOnForeclosedAssets
Namespace Prefix: | gsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 35 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL49126937-111524 + Details
Name: | us-gaap_MortgageLoansInProcessOfForeclosureAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_CounterpartyNameAxis=gsbc_FormerBranchMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |