GCS Credit Union Ballpark is a minor league baseball facility in Sauget, Illinois, that serves as the home ballpark for the Gateway Grizzlies of the Frontier League. The Grizzlies' ballpark was built in time for the start of the 2002 season, under the original name of GMC Stadium. GCS Ballpark features reserved box seating, lawn seating, party suites, two hot tubs, and a section of bleacher seating. With the bleacher section added in 2004, the stadium's capacity has increased to 6,000 fans. In 2004, the Grizzlies became the first team in Frontier League history to draw over 200,000 fans for a season, finishing with a league best 217,500. ProGrass synthetic turf was installed at GCS Ballpark in January 2012.