Deposits - Weighted Average Interest Rate on Certificates of Deposit (Details)	Dec. 31, 2021	Dec. 31, 2020
Deposits
Weighted average interest rate on certificates of deposit	0.60%	1.00%

Represents the Weighted average interest rate on certificates of deposit, as of the indicated date.

No definition available.

Name:	gsbc_WeightedAverageInterestRateOnCertificatesOfDeposit
Namespace Prefix:	gsbc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant