Information on GNC in Mahopac, NY 10541 Outlet Note Regular Brands GNC New York Mahopac 328083 Rating 4.7 based on 97 votes Address 159 Route 6 Mahopac, NY 10541 Phone Hours may vary in different stores. For accurate hours, please contact each store directly. Suite643 Hours may vary in different stores. For accurate hours, please contact each store directly. Nearby GNC Outlet GNC Outlet - Ardsley GNC Outlet - Albertson GNC Outlet - Astoria GNC Outlet - Auburndale People Also Viewed