| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. T Petenyi vs G Gaehwiler |
| ½-½ | 24 | 2007 | EU-ch U14 17th | A18 English, Mikenas-Carls |
| 2. G Gaehwiler vs V Plat |
| ½-½ | 24 | 2007 | EU-ch U14 17th | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 3. G Gaehwiler vs H Grabher |
| 1-0 | 32 | 2008 | Liechtenstein op 26th | B33 Sicilian |
| 4. S Williams vs G Gaehwiler |
| 1-0 | 23 | 2008 | SUI-ch op | D35 Queen's Gambit Declined |
| 5. A Kargin vs G Gaehwiler |
| 0-1 | 38 | 2008 | 8th Winterthur Chess Week | B90 Sicilian, Najdorf |
| 6. G Gaehwiler vs F Jenni |
| ½-½ | 45 | 2008 | 8th Winterthur Chess Week | C45 Scotch Game |
| 7. Z Zambo vs G Gaehwiler |
| 0-1 | 37 | 2008 | 8th Winterthur Chess Week | A01 Nimzovich-Larsen Attack |
| 8. V S Gujrathi vs G Gaehwiler |
| 1-0 | 44 | 2008 | Wch U14 | A49 King's Indian, Fianchetto without c4 |
| 9. J Moussard vs G Gaehwiler |
| 0-1 | 43 | 2008 | Wch U14 | B53 Sicilian |
| 10. I Bukavshin vs G Gaehwiler |
 | 1-0 | 45 | 2008 | Wch U14 | B23 Sicilian, Closed |
| 11. G Gaehwiler vs N Meshkovs |
| 1-0 | 25 | 2008 | Wch U14 | B42 Sicilian, Kan |
| 12. G Gaehwiler vs Y Chan |
| 0-1 | 43 | 2008 | Wch U14 | C45 Scotch Game |
| 13. G Gaehwiler vs P Michalik |
| 0-1 | 55 | 2009 | Mitropa Cup | C02 French, Advance |
| 14. Miroshnichenko vs G Gaehwiler |
| 1-0 | 39 | 2009 | Zurich Chess Club 200th Anniversary | E93 King's Indian, Petrosian System |
| 15. Kasparov vs G Gaehwiler |
| 1-0 | 35 | 2009 | World Champions Simultaneous Exhibition | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 16. G Gaehwiler vs R Angst |
| 1-0 | 46 | 2009 | Christmas Open Masters | C41 Philidor Defense |
| 17. G Gaehwiler vs S Williams |
| 0-1 | 31 | 2010 | SUI-ch op | C02 French, Advance |
| 18. A Miatello vs G Gaehwiler |
| 1-0 | 23 | 2010 | Biel MTO | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 19. A Domont vs G Gaehwiler |
| 1-0 | 40 | 2010 | Biel MTO | B23 Sicilian, Closed |
| 20. V Nedilko vs G Gaehwiler |
| 1-0 | 30 | 2010 | Biel MTO | E62 King's Indian, Fianchetto |
| 21. G Gaehwiler vs M Lagarde |
| 0-1 | 39 | 2010 | WYCC Open U16 | B40 Sicilian |
| 22. G Gaehwiler vs F Bindrich |
| ½-½ | 43 | 2010 | 34th Christmas Master Open | C45 Scotch Game |
| 23. G Gaehwiler vs Gleizerov |
| 1-0 | 39 | 2011 | Winterthur op | A90 Dutch |
| 24. M Bosiocic vs G Gaehwiler |
| 1-0 | 38 | 2012 | European Championship | E76 King's Indian, Four Pawns Attack |
| 25. G Gaehwiler vs E Can |
| ½-½ | 62 | 2012 | European Championship | E61 King's Indian |
Kibitzing
