He currently plays for UMF Njardvik, wearing the number 22 shirt. He plays primarily as a Defender. His current market value is estimated at 10K €.

His most recent move was a Loan from UMF Njardvik to Valur Reykjavik on 2027-02-04.

Throughout the Iceland League Cup 2025, gisli stefan stefansson featured in 3 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.