Information on GNC in Castleton, NY 12033 Outlet Note Regular Brands GNC New York Castleton 325905 Rating 4.7 based on 97 votes Address 1645 Columbia Turnpike Castleton, NY 12033 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 - Albany GNC Outlet - Albany GNC Outlet - Albany GNC Outlet - Albany People Also Viewed