Information on GNC in Baltimore, MD 21220 Outlet Note Regular Brands GNC Maryland Baltimore 325369 Rating 4.7 based on 97 votes Address 6 Carroll Island Road Baltimore, MD 21220 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 - Baltimore GNC Outlet - Baltimore GNC Outlet - Baltimore GNC Outlet - Baltimore People Also Viewed