Info
| Last name | Theunisse |
| First name | Gert-Jan |
| Nationality |  Netherlands |
| Date of birth | 14-01-1963 |
| Age | 62 |
| Place of birth | Oss |
Monuments
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
| 29-08 | 21 |  UCI World Championship Oslo (CM) | |||||
| 25-08 | 8 | Veenendaal-Veenendaal (1.2) | |||||
| 22-08 | 12 |  Meisterschaft von Zürich (CDM) | |||||
| 15-08 | 6 |  Leeds Classic (CDM) | |||||
| 07-08 | 38 |  Clásica Ciclista San Sebastián (CDM) | |||||
| 31-07 | 14 |  Trofeo Matteotti (1.2) | |||||
 Quatre Jours de Dunkerque (2.1) | |||||||
| 9 |  Standings | ||||||
| 09-05 | Stage 6Dunkerque - Dunkerque (188.0km) | ||||||
| 01-05 | 21 |  Rund um den Henninger Turm (1.1) | |||||
| 24-04 | 8 | Amstel Gold Race (CDM) | |||||
| 18-04 | 13 |  Liège-Bastogne-Liège (CDM) | |||||
| 14-04 | 8 | La Flèche Wallonne (1.1) | |||||
| Vuelta Ciclista al Pais Vasco (2.1) | |||||||
| 05-04 | 6 | Stage 1Renteria - Renteria (135.0km) | |||||
| 20-03 | 42 | Milano-Sanremo (CDM) | |||||
Teams
| Year | Team |
|---|---|
| 1995 | Collstrop - Lystex |
| 1994 | TVM - Bison Kit |
| 1993 | TVM - Bison Kit |
| 1992 | TVM-Sanyo |
| 1991 | TVM-Sanyo |
| 1990 | Panasonic-Sportlife |
| 1989 | PDM-Ultima-Concorde |
| 1988 | PDM-Ultima-Concorde |
| 1987 | PDM-Ultima-Concorde |
| 1986 | Panasonic |
| 1985 | Panasonic |
| 1984 | Panasonic |
Victories
| This year | 0 |
| Total | 5 |