Information on GNC in Acton, MA 01720 Outlet Note Regular Brands GNC Massachusetts Acton 325063 Rating 4.7 based on 97 votes Address 100 Powder Mill Road Acton, MA 01720 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 - Concord GNC Outlet - Bedford GNC Outlet - Burlington GNC Outlet - Billerica People Also Viewed