She represented her country in the 100 m and 200 m breaststroke events at the Summer Olympics in Beijing, China without advancing to the finals. Günaydın qualified to participate in the 100 m breaststroke event at the 2012 Summer Olympics by setting a new national record with 1.09.27. At the 2012 Summer Olympics, she competed in the 100 and 200 m breaststroke.