Georges Ronsse belonged to the Belgian elite cycling between the two world wars. From 1926 to 1938 he ran as a pro. In 1927 he won the classic Bordeaux - Paris and Paris -Roubaix in itself; 1928 was followed by another victory at Paris -Brussels.
In the same year Ronsse was in Budapest Road World Champion of professionals with the highest ever achieved ahead of 17:33 minutes; of 16 starters were only eight finish. This title he successfully defended a year later in Zurich. 1930 succeeded Ronsse again a victory at the Races Bordeaux - Paris; In the same year he finished third at the Road World Championships. In 1933 he was third in the Tour of Belgium.
Ronsse drove as upright on the track and was in this discipline three times (1934, 1935, 1936) national champion and third twice at the World Championships.
Although Ronnse 1928-1931 also in three races as a cyclocross rider active and could at the Critérium International de Cyclo-cross 1928, 1930 and 1931 take the top three.