GSB has been serving the financial needs of individuals, families, and businesses in Connecticut for 140 years.

Founded in 1875 by 17 local business owners, we have proudly stood as a trusted institution in the communities we serve. Starting with a $17,000 investment and one branch on the picturesque Guilford Town Green, GSB has grown to a six-office, $700 million bank.

Time has passed, but our commitment to the community remains equally strong. The first item on our strategic plan is to always remain a mutual savings bank. We have no stockholders. That means it's in our best interest that you succeed. You thrive, we thrive. This customer focus sets us apart from other financial institutions.

Find out what sets us apart from other banks by exploring our recent annual reports. They include information about our long-term goals, our commitment to local businesses and non-profits, and our dedication to your needs and those of the community.

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Small Bank Big Capabilities

Small bank big capabilities

We're proud to combine the values of a small bank with big bank capabilities. Our small size means you work directly with decision-makers who live in your community, resulting in a level of personalized service that larger banks can't match. Our size keeps us nimble, and allows us to create relationships tailored to your specific needs.


personal service & community values

To succeed as your bank, we need to be at the top of the game. We offer cutting-edge products and services, all designed to make your life easier. We are committed to outstanding customer service and a degree of personalization that bigger banks can't match. Additionally, we support the communities we serve through financial donations and volunteer hours.


With strong community values, personalized service, and a wide range of offerings, it's no surprise we've won the loyalty of so many customers. As a mutual savings bank, it's in our best interest to look out for our clients. Make the switch today and find out what we can do for you.

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Madison Cultural Arts Concert on the Green

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