Information on GNC in Bethlehem, PA 18017 Outlet Note Regular Brands GNC Pennsylvania Bethlehem 325516 Rating 4.7 based on 97 votes Address 1781 Stefko Boulevard Bethlehem, PA 18017 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 - Bethlehem GNC Outlet - Bethlehem GNC Outlet - Bethlehem GNC Outlet - Bethlehem People Also Viewed