Gunn has had recurring roles in the TV series Going to California, Andy Richter Controls the Universe, October Road, The Morning After, H+, and Gilmore Girls: A Year in the Life. Gunn created the TV series short PG Porn and was a writer for it from 2008 to 2009. He also produced the film The Specials in 2000 and the shorts Love, Sex & Murder in 2001 and The Man Who Invented the Moon in 2003. His older brother is filmmaker James Gunn and his siblings including Matt Gunn and Brian Gunn.