Nature of Operations and Summary of Significant Accounting Policies - Options to Purchase Shares of Common Stock (Details) - shares	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Nature of Operations and Summary of Significant Accounting Policies
Options to purchase shares of common stock outstanding not included in computation of diluted earnings per share because exercise price greater than average market price	559,484	383,338	758,901

Represents the Options to purchase shares of common stock outstanding not included in computation of diluted earnings per share because exercise price greater than average market price (number of shares), during the indicated time period.

No definition available.

Name:	gsbc_OptionsToPurchaseSharesOfCommonStockOutstandingNotIncludedInComputationOfDilutedEarningsPerShareBecauseExercisePriceGreaterThanAverageMarketPrice
Namespace Prefix:	gsbc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration