 Nyora kupfuurira kweiyi ndima - Muna Gumiguru 2013, zvakaziviswa kuti Guðmundur aizotora basa semurairidzi mukuru weDenmark varume vechikwata chemaoko chechikwata muna 1 Chikunguru 2014, achitsiva Ulrik Wilbek. Musi wa21 Nyamavhuvhu 2016 Guðmundur akatungamira timu yake kuhwina menduru yegoridhe kumaOlympics eZhizha a2016muRio de Janeiro, Brazil. Munguva yeOlympics, Wilbek akaedza kaviri kuwana mvumo yevatambi veDenmark yekudzinga Guðmundur, kamwe panguva yemutambo uyezve zuva rakatevera Denmark yakahwina goridhe. Akazivisa munaNovember 2016 kuti aisazovandudza kondirakiti yake, iyo yaifanirwa kupera musi wa1 Chikunguru 2017. Mushure mekubva kwake kuchikwata cheDenmark, Guðmundur akashoropodza mutangiri wake Wilbek, uyo aive ipapo mukuru weDanish Handball Federation, akaedzazve kudzikisira manejimendi ake echikwata panguva yeOlympics. 