Information on GNC in Millsboro, DE 19966 Outlet Note Regular Brands GNC Delaware Millsboro 328378 Rating 4.7 based on 97 votes Address 28511 Dupont Blvd Millsboro, DE 19966 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 - Millsboro GNC Outlet - Selbyville GNC Outlet - Georgetown GNC Outlet - Rehoboth Beach People Also Viewed