GCS Credit Union Address: 2001 Lee Ave, Granite City, IL 62040 Phone: (618) 797-7993 Hours: Mon: 8:30am-5pm Tue: 8:30am-5pm Wed: 10am-5pm Thu: 8:30am-5pm Fri: 8:30am-6pm Banks, Credit Unions Other Businesses: US Bank at 3303 Nameoki Rd, Granite City, IL 62040 First Bank at 3600 Nameoki Rd, Granite City, IL 62040 Guardian Savings Bank at 3800 Nameoki Rd, Granite City, IL 62040 Bank Of Edwardsville at 3830 Nameoki Rd, Granite City, IL 62040