Gert-Jan Theunisse
| Personal information | |
|---|---|
| Full name | Gert-Jan Theunisse | 
| Born | 14 January 1963 Oss, the Netherlands  | 
| Team information | |
| Current team | Retired | 
| Discipline | Road | 
| Role | Rider | 
| Professional teams | |
| 1984–1986 | Panasonic | 
| 1987–1989 | PDM-Concorde | 
| 1990 | Panasonic-Sportlife | 
| 1991–1992 | TVM Sanyo | 
| 1993–1994 | TVM-Bison Kit | 
| 1995 | Collstrop-Lystex | 
| Major wins | |
Grand Tours
  | |
Gert-Jan Theunisse (born 14 January 1963) is a Dutch former road bicycle racer. He won the 1988 edition of the Clásica San Sebastián one-day race. In the 1989 Tour de France, he won the King of the Mountains competition.