OTHER REAL ESTATE OWNED AND REPOSSESSIONS - Expenses applicable to other real estate owned and repossessions (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
OTHER REAL ESTATE OWNED AND REPOSSESSIONS
Net gains on sales of other real estate owned and repossessions	$ (22)	$ (5)	$ (41)	$ (148)
Valuation write-downs			82	23
Operating expenses, net of rental income	84	89	222	438
Expenses on other real estate owned and repossessions	$ 62	$ 84	$ 263	$ 313

Represents the monetary amount of Net (gain) loss on sales of other real estate owned, during the indicated time period.

No definition available.

Name:	gsbc_NetGainLossOnSalesOfOtherRealEstateOwned
Namespace Prefix:	gsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration