| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. G Gaertner vs G Mainka |
| 1-0 | 12 |
1989 |
Nova-Park/SW,2,19 | D20 Queen's Gambit Accepted |
| 2. G Gaertner vs V Arapovic |
| ½-½ | 27 |
1989 |
Mendrisio op | A42 Modern Defense, Averbakh System |
| 3. G Gaertner vs Y Kruppa |
 | 0-1 | 26 |
1995 |
Oberwart op | E71 King's Indian, Makagonov System (5.h3) |
| 4. A Kovacevic vs G Gaertner |
| ½-½ | 54 |
1999 |
EUCup Gr4 | B33 Sicilian |
| 5. G Gaertner vs F Winiwarter |
| 1-0 | 52 |
2000 |
Tch-AUT -01 | E71 King's Indian, Makagonov System (5.h3) |
| 6. O Staudner vs G Gaertner |
| ½-½ | 22 |
2000 |
Tch-AUT -01 | B40 Sicilian |
| 7. A Postl vs G Gaertner |
| ½-½ | 58 |
2000 |
Tch-AUT -01 | A04 Reti Opening |
| 8. J Gdanski vs G Gaertner |
| 1-0 | 60 |
2001 |
ECC | B10 Caro-Kann |
| 9. G Gaertner vs H Blaas |
| 0-1 | 55 |
2001 |
TCh-AUT -2 | D31 Queen's Gambit Declined |
| 10. E Frosch vs G Gaertner |
| 1-0 | 68 |
2001 |
Tch-AUT 2000-01 | E17 Queen's Indian |
| 11. M Sjoberg vs G Gaertner |
| ½-½ | 56 |
2001 |
ECC | D19 Queen's Gambit Declined Slav, Dutch |
| 12. G Gaertner vs P Scheffknecht |
| 1-0 | 39 |
2001 |
Staatsliga B Ost 2000/ | E30 Nimzo-Indian, Leningrad |
| 13. G Gaertner vs H Teske |
| 0-1 | 52 |
2001 |
ECC | D35 Queen's Gambit Declined |
| 14. G Gaertner vs H Penz |
| ½-½ | 71 |
2001 |
Tch-AUT 2000-01 | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 15. G Gaertner vs M Huizer |
| 1-0 | 18 |
2001 |
ECC | A66 Benoni |
| 16. P Roth vs G Gaertner |
| ½-½ | 13 |
2001 |
TCh-AUT -2 | B13 Caro-Kann, Exchange |
| 17. G Gaertner vs T Mahdy |
| ½-½ | 21 |
2001 |
Tch-AUT 2000-01 | A48 King's Indian |
| 18. G Gaertner vs K Petzold |
| ½-½ | 36 |
2001 |
ECC | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 19. H Peterwagner vs G Gaertner |
| ½-½ | 82 |
2001 |
Tch-AUT 2000-01 | B16 Caro-Kann, Bronstein-Larsen Variation |
| 20. G Gaertner vs K Fahrner |
| 1-0 | 73 |
2001 |
TCh-AUT -2 | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 21. H Teske vs G Gaertner |
| ½-½ | 22 |
2001 |
Tch-AUT 2000-01 | D10 Queen's Gambit Declined Slav |
| 22. J Palkovi vs G Gaertner |
| 1-0 | 71 |
2001 |
ECC | B22 Sicilian, Alapin |
| 23. H Teske vs G Gaertner |
| ½-½ | 56 |
2001 |
TCh-AUT -2 | A18 English, Mikenas-Carls |
| 24. G Gaertner vs W Posch |
| ½-½ | 33 |
2001 |
Tch-AUT 2000-01 | A01 Nimzovich-Larsen Attack |
| 25. G Gaertner vs R Perhinig |
| 1-0 | 76 |
2002 |
TCh-AUT 2001-2 | A01 Nimzovich-Larsen Attack |