The Gateway Grizzlies are a professional baseball team based in the St. Louis suburb of Sauget, Illinois, in the United States. The Grizzlies are a member of the West Division of the Frontier League, which is a partner league of Major League Baseball. The Grizzlies played their home games during their inaugural 2001 season at Sauget Field. In 2002, GCS Credit Union Ballpark (formerly GMC Stadium) opened and has remained the club's home since. GCS Credit Union Ballpark initially opened up to the public in time for the 2002 season for the Gateway Grizzlies. Some of the defining features of GCS Credit Union Ball park include lawn seats, bleacher seats, box seating, party suites, hot tub suite, and more.