Information on GNC in Exeter, NH 03833 Outlet Note Regular Brands GNC New Hampshire Exeter 326705 Rating 4.7 based on 97 votes Address 75 Portsmouth Avenue Unit 1 Exeter, NH 03833 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 - Kingston GNC Outlet - Epping GNC Outlet - Durham GNC Outlet - Lee People Also Viewed