Born and raised in a working class suburb of the capital of Iceland, Reykjavík, Guðmundur has for as long as he can remember been on his way to the countryside, or at least a fishing village, where he would like to spend all his days with a constantly pregnant wife, a growing family. Despite that he has been living in the center of Reykjavík since he left home, going to college and the University of Iceland where he studied Icelandic and philosophy, but graduation pending. While studying Guðmundur worked ― simply to afford existing ― for the longest time for Landsbanki (1999―2008, 2008―2011), the second most ambitious bank in Iceland, before the economic meltdown, in terms of financial world domination.
Guðmundur has written since he was nine, but not taking the art seriously until February 2003. In 2007 he published a collection of short prose, in 2008 a novel, and another one, Bankster, in 2009. The last one brought him the prestigious Icelandic Literary Award. Some of Guðmundur´s work has been translated and faired reasonably on the foreign market. Since 2010 Guðmundur has allowed his interest in movies to rule. Working with the rogue director Marteinn Thorsson on various ideas, to date resulting in the scripts XL (2011) and Bankster (2010―2011); the co-operation becoming so very close and productive that both had their first child in 2011, and both with women way out of their league.
In Icelandic, Guðmundur means under God´s protective wing; a firm foundation for a reckless life.