| Gwan vs Kazuya | 26–16 | 61.90% |
| Gwan vs Paul | 15–7 | 68.18% |
| Gwan vs Hwoarang | 14–8 | 63.64% |
| Gwan vs Bryan | 15–7 | 68.18% |
| Gwan vs Lili | 15–5 | 75.00% |
| Gwan vs Devil Jin | 12–7 | 63.16% |
| Gwan vs Reina | 9–7 | 56.25% |
| Gwan vs Dragunov | 8–7 | 53.33% |
| Gwan vs Azucena | 9–6 | 60.00% |
| Gwan vs Law | 9–5 | 64.29% |
| Gwan vs Yoshimitsu | 9–3 | 75.00% |
| Gwan vs Lee | 8–4 | 66.67% |
| Gwan vs Victor | 8–4 | 66.67% |
| Gwan vs Alisa | 5–6 | 45.45% |
| Gwan vs Claudio | 8–2 | 80.00% |
| Gwan vs King | 6–3 | 66.67% |
| Gwan vs Lars | 6–3 | 66.67% |
| Gwan vs Jin | 6–2 | 75.00% |
| Gwan vs Steve | 5–3 | 62.50% |
| Gwan vs Jun | 3–5 | 37.50% |
| Gwan vs Leo | 5–2 | 71.43% |
| Gwan vs Lidia | 4–3 | 57.14% |
| Gwan vs Feng | 3–3 | 50.00% |
| Gwan vs Panda | 3–3 | 50.00% |
| Gwan vs Nina | 1–4 | 20.00% |
| Gwan vs Kuma | 3–1 | 75.00% |
| Gwan vs Asuka | 2–1 | 66.67% |
| Gwan vs Leroy | 1–2 | 33.33% |
| Gwan vs Jack-8 | 0–2 | 0.00% |
| Gwan vs Shaheen | 2–0 | 100.00% |
| Gwan vs Heihachi | 2–0 | 100.00% |
| Gwan vs Raven | 1–0 | 100.00% |
| Gwan vs Eddy | 1–0 | 100.00% |
| Gwan vs Armor King | 1–0 | 100.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.