Gallagher lives and practices art in Kerikeri, Far North. He has maintained his art practice for over 40 years while working in the media and advertising industries as an art and creative director but has only exhibited rarely. 1984 at Red Metro Gallery, Dunedin; 2011 at Artis/Ocula Gallery, Auckland; 2012 at Snake Pit as part of the Rob Garrett curated exhibition ‘Lost in a Dream’ for Auckland Art Week.