Gates GMC - Nissan car dealership in N. Windham, CT. invites you to come buy your next new car, new truck, new SUV, used car, used truck or used SUV. We provide auto service, auto parts and auto financing for new cars and used cars. You can search online though all models of GMC, Nissan, cars and trucks. Proudly serving the cities of N. Windham, CT. Hartford, CT. Putnam, CT.