Information on GNC in Wilmington, DE 19802 Outlet Note Regular Brands GNC Delaware Wilmington 330684 Rating 4.7 based on 97 votes Address 3801 n. Market Street Wilmington, DE 19802 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 - Wilmington GNC Outlet - Wilmington GNC Outlet - Wilmington GNC Outlet - Wilmington People Also Viewed