Gül competed in the Greco-Roman 120 kg event at the 2004 Summer Olympics placing 13th. He won the silver medal at the 2005 European Wrestling Championships in Varna, Bulgaria and at the 2005 Summer Universiade in İzmir, Turkey, and another silver at the Mediterranean Games in Almeria, Spain the same year. At the 2005 World Wrestling Championships held in Budapest, Hungary, he won the bronze medal.