Hours Of Operations GNC Wisconsin Fon du Lac GNC Hours of Operation and Locations in Fon du Lac, WI 4.9 - 150 votes 2 Locations in Fon du Lac GNC Hours Category: Beauty & Health GNC - Fon du Lac, WI 54935 1135 e. Johnson St(920) 926-9554 View Store Details GNC - Fon du Lac, WI 54935 835 West Johnson Street(920) 921-3320 View Store Details Recommend For You Cotton on Bally Total Fitness Eastern Mountain Sports Trader Joe's The Athlete's Foot Diane's Beachwear Bottega Veneta Hanna Andersson Louis Vuitton Sportsman's Warehouse