He currently plays for Yeni Mersin İdman Yurdu AŞ, wearing the number 33 shirt. He plays primarily as a Defender. His preferred foot is Right. His current market value is estimated at 100K €.

His most recent move was a from Yeni Mersin İdmanyurdu to Magusa Türk Gücü on 2025-07-09.

Throughout the Turkish Cup 2024-2025, G. Gelmen featured in 1 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.