v3.25.2
Cover
Jul. 21, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 21, 2025
Entity File Number 000-56605
Entity Registrant Name GOUVERNEUR BANCORP, INC.
Entity Central Index Key 0001978811
Entity Tax Identification Number 37-2102925
Entity Incorporation, State or Country Code MD
Entity Address, Address Line One 42 Church Street
Entity Address, City or Town Gouverneur
Entity Address, State or Province NY
Entity Address, Postal Zip Code 13642
City Area Code 315
Local Phone Number 287-2600
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security None
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false