Gildo's first performance was with the
Munich Kammerspiele theatre group in 1956, but he quickly moved into television and film, as well as performing as a singer, duetting with Danish singer
Gitte Haenning as "Gitte & Rex". His most popular songs, such as
Speedy Gonzales (1962),
Goodbye Susanna (1965) and
Fiesta Mexicana (1972), were sung during the 1960s and 1970s in Germany. His music and films sold well there but less so abroad. He also starred in his own television program,
Gestatten – Rex Gildo. During the 1980s and 1990s, Gildo's popularity decreased. His appearances were mainly at
folk festivals, shopping centres and other similar venues; he was also reported to have problems with alcoholism. His final performance, on the day of his suicide attempt, was in front of more than 3000 people at a furniture shop outside
Frankfurt. ==Personal life and death==