GT World Challenge Australia
The GT World Challenge Australia, formerly known as the Australian GT Championship, is a Motorsport Australia-sanctioned national title for drivers of GT cars, held annually from 1960 to 1963, from 1982 to 1985 and from 2005. Each championship up to and including the 1963 title was contested over a single race and those after that year over a series of races.
Source: Wikipedia — GT World Challenge Australia (CC BY-SA 4.0)