Gardner made her professional debut on 8 September 2001 at the Mount Buller women's aerial event. Since her debut, she has competed the Europa, Nor-Am, and World Cup. Her coach is Michel Roth. Her best World Cup result was third at Fernie, British Columbia and Sauze d'Oulx, Italy. She has participated in two Olympic games; the 2006 Turin Olympics and the 2010 Vancouver Winter Games. Gardner finished 23 in Turin. She has currently qualified for the finals at the Vancouver aerial event.