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EARNINGS PER SHARE (Details) - shares	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
EARNINGS PER SHARE
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	581,322	854,813

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