GCS 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.