Information on GNC in Manchester, NH 03102 Outlet Note Regular Brands GNC New Hampshire Manchester 328104 Rating 4.7 based on 97 votes Address 577 Mast Road Manchester, NH 03102 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 - Manchester GNC Outlet - Manchester GNC Outlet - Manchester GNC Outlet - Manchester People Also Viewed