| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. G Quillan vs E Teichmann |
| 1-0 | 32 |
1986 |
Southampton | C44 King's Pawn Game |
| 2. G Quillan vs G Copeland |
| 0-1 | 24 |
1987 |
Ch Great Britain | C29 Vienna Gambit |
| 3. Adams vs G Quillan |
| 1-0 | 54 |
1988 |
Oakham | C05 French, Tarrasch |
| 4. Fedorowicz vs G Quillan |
| 1-0 | 30 |
1989 |
World | B06 Robatsch |
| 5. Sherzer vs G Quillan |
| 1-0 | 26 |
1989 |
It (open) | C05 French, Tarrasch |
| 6. G Quillan vs A Galliamova-Ivanchuk |
| ½-½ | 64 |
1990 |
Prestwich | B30 Sicilian |
| 7. G Quillan vs Sherzer |
| 0-1 | 41 |
1990 |
Prestwich (England) | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 8. Anand vs G Quillan |
 | 1-0 | 39 |
1990 |
Prestwich | C19 French, Winawer, Advance |
| 9. G Quillan vs D Norwood |
| ½-½ | 42 |
1990 |
Prestwich (England) | B06 Robatsch |
| 10. Hebden vs G Quillan |
| 1-0 | 42 |
1993 |
BCF-ch Dundee | A43 Old Benoni |
| 11. G Quillan vs N Pert |
| 0-1 | 61 |
2001 |
British Rapidplay | C05 French, Tarrasch |
| 12. G Quillan vs K White |
| 1-0 | 45 |
2005 |
Gibraltar Masters | B01 Scandinavian |
| 13. E Postny vs G Quillan |
| 0-1 | 40 |
2005 |
Gibraltar Masters | A65 Benoni, 6.e4 |
| 14. D Gormally vs G Quillan |
| 1-0 | 21 |
2005 |
Gibraltar Masters | C05 French, Tarrasch |
| 15. S Kristjansson vs G Quillan |
| ½-½ | 7 |
2005 |
Gibraltar Masters | C01 French, Exchange |
| 16. G Quillan vs S Williams |
| 1-0 | 53 |
2005 |
Gibraltar Masters | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 17. G Quillan vs V Cmilyte |
| ½-½ | 71 |
2005 |
Gibraltar Masters | B31 Sicilian, Rossolimo Variation |
| 18. G Quillan vs J Shaw |
| ½-½ | 17 |
2005 |
Gibraltar Masters | B31 Sicilian, Rossolimo Variation |
| 19. I Rajlich vs G Quillan |
| ½-½ | 59 |
2005 |
Gibraltar Masters | A46 Queen's Pawn Game |
| 20. Lahno vs G Quillan |
| ½-½ | 38 |
2005 |
Gibraltar Masters | C18 French, Winawer |
| 21. G Quillan vs G Sargissian |
| 0-1 | 46 |
2005 |
Gibraltar Masters | C91 Ruy Lopez, Closed |
| 22. G Quillan vs A Dunn |
| 1-0 | 79 |
2006 |
Gibtelecom Chess Festival | B23 Sicilian, Closed |
| 23. G Quillan vs S Macgilchrist |
| 1-0 | 23 |
2006 |
European Union Individual Championships | B14 Caro-Kann, Panov-Botvinnik Attack |
| 24. K Spraggett vs G Quillan |
| 1-0 | 43 |
2006 |
Gibtelecom Chess Festival | C18 French, Winawer |
| 25. G Quillan vs R Williamson |
| ½-½ | 61 |
2006 |
European Union Individual Championships | C87 Ruy Lopez |