[citation needed] Gann then worked for the Queensland Theatre Company as an actor in several development projects and starred in the Sven Swenson play The Vertigo and the Virginia for QTC in 1999.

He then appeared in Australian feature films including Gettin' Square, Thunderstruck, The Illustrated Family Doctor, and Kenny.

In 2006, Gann wrote and starred in 52 episodes of the sketch comedy show The Wedge on Australia's Network Ten.

Gann then created, produced, wrote and starred in the network's spin-off comedy series Mark Loves Sharon.

The following year, Gann co-created and played the title character for the Australian comedy series Wilfred, based on the short film.

Faced with redeveloping the show for an American market without Tony Rogers, Gann teamed with Family Guy executive producer David Zuckerman.

Gann's legal counsel advised him to plead guilty rather than fight the allegation, as a tough sentence could have threatened the production of Wilfred in the United States.