Information on GNC in Ephrata, WA 98823 Outlet Note Regular Brands GNC Washington Ephrata 326672 Rating 4.7 based on 97 votes Address 250 Basin Street Sw Ephrata, WA 98823 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 - E Wenatchee GNC Outlet - College Place GNC Outlet - Covington GNC Outlet - Bonney Lake People Also Viewed