Ku sii wad qodobkan - Guðmundur Arnlaugsson waxaa sidoo kale loo yaqaanay garsooraha tartanka shaakada laga soo bilaabo horraantii 1970-yadii. Sanadkii 1972, wuxuu noqday Garsoore Caalami ah oo FIDE ah. Sanadkii 1981, wuxuu ahaa mid ka mid ah garsoorayaasha Anatoly Karpov iyo Viktor Korchnoi ee tartanka horyaalka adduunka ee shaashadda
Waxaad Guðmundur Arnlaugsson wuxuu sidoo kale ahaa faallo iyo dhiirrigeliye shaashad raadiyaha iyo telefishanka Iceland.