Information on GNC in Bay City, MI 48708 Outlet Note Regular Brands GNC Michigan Bay City 325417 Rating 4.7 based on 97 votes Address 500 Lafayette Avenue Bay City, MI 48708 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 - Bay City GNC Outlet - Bridgeport GNC Outlet - Birch Run GNC Outlet - Alma People Also Viewed