| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Guillermo•García Castillo |
| Used name | Guillermo•García |
| Born | 17 November 1955 |
| Measurements | 180 cm / 72 kg |
| NOC | Mexico |
Guillermo García had the following podium finishes at major championships: 3rd in the 1971 Pan American Games 1500 metres freestyle, 3rd in the 1975 Pan American Games 4×100 metres freestyle (with Eduardo Pérez and the non-Olympians Jorge Necochea and Ricardo Sasser).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1972 Summer Olympics | Swimming (Aquatics) | MEX |
Guillermo García | |||
| 200 metres Freestyle, Men (Olympic) | ||||||
| 400 metres Freestyle, Men (Olympic) | 21 | |||||
| 1,500 metres Freestyle, Men (Olympic) | 8 | |||||
| 4 × 100 metres Freestyle Relay, Men (Olympic) | Mexico | 12 | ||||
| 4 × 200 metres Freestyle Relay, Men (Olympic) | Mexico | 12 | ||||
| 4 × 100 metres Medley Relay, Men (Olympic) | Mexico | 13 | ||||
| 1976 Summer Olympics | Swimming (Aquatics) | MEX |
Guillermo García | |||
| 200 metres Freestyle, Men (Olympic) | 35 | |||||
| 400 metres Freestyle, Men (Olympic) | ||||||
| 4 × 200 metres Freestyle Relay, Men (Olympic) | Mexico | 14 | ||||
| 4 × 100 metres Medley Relay, Men (Olympic) | Mexico | 12 |