In 1992, Gaha hosted the teen game show Vidiot for the Australian public broadcaster ABC.[5] In 1996, he became a presenter on Channel 9's Animal Hospital, where he started producing his own stories. He worked on Animal Hospital for four years.[6]
In 1999, Gaha received a Centenary of Federation grant[6] to produce the documentary The Ties that Bind. Subsequently, a series of six half-hour documentaries was completed[7] where prominent Australians of ethnic parents travel back to the birthplace of their ancestors. Each documentary is a personal journey of discovery to find what it means to be Australian.
On 6 May 2011, it was announced that Gaha would be taking over the presidency of Reveille Productions from June 2011.[6] In March 2012, Reveille became known as Shine America.[9]