| Gu Sung-Yun | ||
| Birth Date | 1994-06-27 (age 29) | |
| Birth Place |  |
South Korea |
| Height | 198 cm | |
| Weight | 92 kg | |
| Position | Goalkeeper | |
| Club |  |
Kyoto Sanga FC |
| Number | 94 | |
| National Team | ||
| 2019-2020 | |
South Korea |
| Club Statistics | ||||||
| Season | Club | No. | League | Game | Goal | |
| 2013 | |
Cerezo Osaka | 27 | J1 | 0 | 0 |
| 2014 | |
Cerezo Osaka | 22 | J1 | 0 | 0 |
| 2015 | |
Consadole Sapporo | 25 | J2 | 33 | 0 |
| 2016 | |
Hokkaido Consadole Sapporo | 25 | J2 | 33 | 0 |
| 2017 | |
Hokkaido Consadole Sapporo | 25 | J1 | 33 | 0 |
| 2018 | |
Hokkaido Consadole Sapporo | 25 | J1 | 34 | 0 |
| 2019 | |
Hokkaido Consadole Sapporo | 25 | J1 | 33 | 0 |
| 2020 | |
Hokkaido Consadole Sapporo | 25 | J1 | 1 | 0 |
| 2023 | |
Hokkaido Consadole Sapporo | 25 | J1 | 8 | 0 |
| 2023 | |
Kyoto Sanga FC | 94 | J1 | 8 | 0 |
| 2024 | |
Kyoto Sanga FC | 94 | J1 | ||
| Total | J1 | 117 | 0 | |||
| J2 | 66 | 0 | ||||
| J3 | 0 | 0 | ||||
| National Team Statistics | ||||
| Season | Team | Game | Goal | |
| 2019 | |
South Korea | 2 | 0 |
| 2020 | |
South Korea | 2 | 0 |
| Total | 4 | 0 | ||
