| Gaston vs Jin | 13–25 | 34.21% |
| Gaston vs King | 9–18 | 33.33% |
| Gaston vs Steve | 10–15 | 40.00% |
| Gaston vs Hwoarang | 9–15 | 37.50% |
| Gaston vs Reina | 12–11 | 52.17% |
| Gaston vs Alisa | 6–15 | 28.57% |
| Gaston vs Law | 7–11 | 38.89% |
| Gaston vs Eddy | 6–12 | 33.33% |
| Gaston vs Kazuya | 3–12 | 20.00% |
| Gaston vs Jun | 5–9 | 35.71% |
| Gaston vs Asuka | 5–7 | 41.67% |
| Gaston vs Dragunov | 6–5 | 54.55% |
| Gaston vs Shaheen | 6–5 | 54.55% |
| Gaston vs Bryan | 3–7 | 30.00% |
| Gaston vs Feng | 1–9 | 10.00% |
| Gaston vs Kuma | 4–6 | 40.00% |
| Gaston vs Lili | 5–3 | 62.50% |
| Gaston vs Victor | 5–3 | 62.50% |
| Gaston vs Devil Jin | 2–5 | 28.57% |
| Gaston vs Lars | 3–4 | 42.86% |
| Gaston vs Nina | 4–3 | 57.14% |
| Gaston vs Xiaoyu | 4–2 | 66.67% |
| Gaston vs Leo | 2–4 | 33.33% |
| Gaston vs Paul | 1–4 | 20.00% |
| Gaston vs Raven | 3–2 | 60.00% |
| Gaston vs Yoshimitsu | 2–2 | 50.00% |
| Gaston vs Claudio | 1–3 | 25.00% |
| Gaston vs Lee | 2–1 | 66.67% |
| Gaston vs Zafina | 2–1 | 66.67% |
| Gaston vs Azucena | 1–2 | 33.33% |
| Gaston vs Heihachi | 2–0 | 100.00% |
| Gaston vs Leroy | 0–1 | 0.00% |
| Gaston vs Anna | 0–1 | 0.00% |
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.