Gus G. (born Konstantinos Karamitroudis, 12 September 1980) is a Greek-American heavy metal guitatist. He immigrated to the USA at the age of 18 to attend the Berklee College of Music, but left it after a few weeks to make a name on the metal scene. He has played for Nightrage, Dream Evil, and Mystic Prophecy. The 2009 was the first year of his collaboration with Ozzy Osbourne. Currenly Gus G. plays with his own band Firewind.