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 | |||||
|---|---|---|---|---|---|---|---|
| 23-06 | 17 | National Road Championships - Netherlands (CN) | |||||
 Tour de Suisse (2.1) | |||||||
| 60 |  Standings | ||||||
| 20-06 | Stage 9bAppenzell - Zürich (123.0km) | ||||||
 Dauphiné Libéré (2.1) | |||||||
| 28-05 | 10 | Stage 2Aix-les-Bains - Ambérieu-en-Bugey (91.0km) | |||||
| 16-03 | 113 |  Milano-Sanremo (CDM) | |||||
| Tirreno-Adriatico (2.1) | |||||||
| 16 | Standings | ||||||
| 13-03 | Stage 6San Benedetto del Tronto - San Benedetto del Tronto (196.0km) | ||||||
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 |