Like many of his peers, Garth’s motorsport career started in karts, winning a national title and seven state titles by the age of 17. He progressed to Formula Ford and became 1997 Australian champion in only his second year in the category.
His talent was recognised by Garry Rogers, who offered him a V8 Supercars seat in one of his Commodore VTs where he notched up some impressive performances, including winning his first Bathurst 1000 in 2000 and finishing second in that year’s Drivers Championship.
As a member of the GRM team, he won the inaugural 2002 Bathurst 24 Hour race in a Holden Monaro and placed second the next year in the same car.
Garth departed GRM at the end of 2004 to drive for the HSV Holden Team and won the 2007 Drivers Championship after a four-way battle for the championship title in the final race.
In 2008, he moved to the Holden Racing Team where he finished third in the Drivers Championship in the first year and went on to win two more Bathurst 1000s in 2009 and 2011 in Holden Commodore VEs. In 2015, he finished third in the Bathurst 1000 and amassed sufficient points in the three endurance races to win the V8 Supercars Enduro Cup.
Garth was welcomed back into the Garry Rogers Motorsport team for the 2017 season, behind the wheel of a newly-built #33 Holden Commodore VF. The team was challenged with the late transition from Volvos, but Garth performed consistently well throughout the extended development period to clock up 12 top ten finishes from 26 starts to give him 9th place in the Drivers Championship and contribute to the team’s fourth placing in the Teams Championship.
For the 2018 season, he will take the wheel of one of the Wilson Security Racing GRM team’s two new Holden Commodore ZBs in the Supercars Championship and Pirtek Enduro Cup.