Information on GNC in Easthampton, MA 01027 Outlet Note Regular Brands GNC Massachusetts Easthampton 326567 Rating 4.7 based on 97 votes Address 32 Union st. Easthampton, MA 01027 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 - Chicopee GNC Outlet - East Longmeadow GNC Outlet - Auburn GNC Outlet - Clinton People Also Viewed