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Nature of Operations and Summary of Significant Accounting Policies - Options to Purchase Shares of Common Stock (Details) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
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	861,661	749,833	559,484

X

- Definition

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.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration