All available race results Gaston Fierro
| Date | Race | Rank |
| 07/09 | G.P. des Nations (free zone) | 22 |
Rider information for 1941
| Rank | 498 |
| Score | 9 |
| Name | Gaston FIERRO |
| Country | France |
| Team | Individual |
No results available in season 1944.
Rider information for 1944
| Rank | 586 |
| Score | 0 |
| Name | Gaston FIERRO |
| Country | France |
| Team | France Sport - Dunlop |
| Date | Race | Rank |
| 15/09 | G.P. des Nations | 18 |
Rider information for 1946
| Rank | 651 |
| Score | 14 |
| Name | Gaston FIERRO |
| Country | France |
| Team | Individual |
No results available in season 1948.
Rider information for 1948
| Rank | 1364 |
| Score | 0 |
| Name | Gaston FIERRO |
| Country | France |
| Team | France Sport - Dunlop |