Career
He is the elder brother of fellow international player Stefán Gíslason. Valur moved from Fram to English side Arsenal in 1996. However, he never made a league appearance for Arsenal, and spent a loan spell at Brighton & Hove Albion in 1997.
He moved to Norwegian side Strømsgodset IF in 1998, before returning to Fram in 1999.
He later played for the Iceland national football team and captained for Fram. He later played mostly for Fylkir.