Van Gerner competed for the Netherlands at the 2012 Summer Olympics. She qualified in 19th place for the individual all-around final with a score of 55.632 on 29 July during qualification. In the all-around final on 2 August, she placed 12th with a score of 57.232.
In June 2013, van Gerner competed at the Fantastic Gymnastic NK 2013 in Rotterdam, scoring a total of 53.275 in the all around competition to finish in second place. van Gerner returned to competition in 2015, competing at the 2015 WOGA Classic, placing second all-around.