Gracie grew up in the southern outskirts of Brisbane in Kuraby and attended John Paul College. Her family later moved to the northern suburbs of the Gold Coast during her teenage years. She began her motorsport career in kart racing before progressing to circuit competition.
Gracie contested the 2013, 2014, and 2015 seasons of the Porsche Carrera Cup Australia Championship. In 2013 she became the first female driver to compete in that championship. In 2014 she achieved five top-10 race results and a 100 percent race finishing record across the season.
In 2015, Gracie moved to the Supercars Dunlop Series, driving for Paul Morris Motorsport. She was the first full-time female competitor in the series in 14 years. She finished eighteenth in the championship standings that year with 634 points and a best race result of 12th.
Later in 2015, it was announced that Gracie would partner Simona de Silvestro at the Bathurst 1000 in a Ford FG X Falcon fielded by Prodrive Racing Australia, running under the banner "Harvey Norman Supergirls." The pairing marked the first female combination at Bathurst since Melinda Price and Kerryn Brewer finished eleventh in 1998. On lap 15 of the race, Gracie was involved in a heavy wall impact at Forrest's Elbow after striking an oil slick. The car underwent extensive repairs and was sent back out with de Silvestro driving, eventually finishing 21st, 40 laps down on the winning pair of Craig Lowndes and Steven Richards.
In 2016, Gracie returned to the Supercars Dunlop Series with Paul Morris Motorsport for a second season and again paired with de Silvestro for the Bathurst 1000, this time in a Nissan Altima L33 fielded by Nissan Motorsport. Despite starting from the back row in 26th, the pair avoided major incidents and finished 14th in the chaotic closing laps of the race — a considerably better result than the year before.
Gracie moved to Dragon Motor Sport for a third Super2 Series season. After only one top-10 finish in 17 races and difficulty securing sponsorship funds, she was replaced partway through by Kumho Series driver Jordan Boys.
In 2023, Gracie returned to motorsport through the GT World Challenge Australia series at the Perth SuperSprint. Driving a first-generation Audi R8 GT3 LMS Ultra in the Trophy Class, she won the class title. She contested a second season in 2024, this time driving a current-specification Audi R8 in the top class alongside Paul Stokell.
Gracie's Supercars career spanned three Dunlop/Super2 Series seasons and two Bathurst 1000 co-drives with Simona de Silvestro. The 2015 Bathurst 1000 pairing drew significant attention as a milestone for female representation at Australia's most prominent endurance race. Her return to GT racing in 2023 and 2024 showed continued involvement in the sport years after her primary career wound down.