Information on GNC in Marietta, OH 45750 Outlet Note Regular Brands GNC Ohio Marietta 328143 Rating 4.7 based on 97 votes Address 301 Greene Street Marietta, OH 45750 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 - Barnesville GNC Outlet - Alliance GNC Outlet - Alliance GNC Outlet - Akron People Also Viewed