The Muster started as a community fundraiser in 1982 and has now grown to a four-day festival attracting musicians from across Australia and internationally.

[2][3] In 2009 as part of the Q150 celebrations, the Gympie Music Muster was announced as one of the Q150 Icons of Queensland for its role as an "event and festival".

In 2021 the Muster was cancelled again due to COVID restrictions, the Queensland–New South Wales border being closed on 23 June.

Greg Cavanagh, chairman of Gympie Music Muster, said in 2021 "We would put the entire future of this festival in jeopardy if we charged ahead this year ….

The line-up in 2021 was to feature all Australian artists including: Troy Cassar-Daley, Kasey Chambers, Graeme Connors, Lee Kernaghan and Busby Marou.