He is on the books of Karaköprü Belediyesi Spor Kulübü and wears shirt number 9. His main role on the pitch is Forward.

During the Turkish Third League 2025-2026 campaign, G. Demirel made 18 appearances, scoring 3 goals and adding 1 assists. He averaged 0.2 goals per match from 0 shots, with 0 on target.