Information on GNC in Royal Oak, MI 48067 Outlet Note Regular Brands GNC Michigan Royal Oak 329573 Rating 4.7 based on 97 votes Address 1026 North Main Street Royal Oak, MI 48067 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 - Bloomfield Hills GNC Outlet - Bloomfield Hills GNC Outlet - Bloomfield Hills GNC Outlet - Bloomfield Hills People Also Viewed