South Korea 31 yearsSung-Yun Gu, a 31-year-old South Korean goalkeeper, plays for Kyoto Sanga. He previously featured for Cerezo Osaka, Hokkaido Consadole Sapporo and Daegu FC, and was a senior international for South Korea.
| Surname | Gu |
| Name | Sung-Yun |
| Native Name | 구성윤 |
| Nationality | South Korea |
| Birthplace | Seoul, South Korea |
| Birth Date | 27 June 1994 |
| Age | 31 years old |
| Position | Goalkeeper |
| Height | 1.95 m |
| Weight | 82 kg |
| AKA | Gu Sung-Yun |
Kyoto Sanga (2024–)Hokkaido Consadole SapporoKyoto SangaHokkaido Consadole SapporoDaegu FCGimcheon SangmuDaegu FCHokkaido Consadole SapporoCerezo Osaka South Korea National Team South Korea Olympic Team South Korea Youth Teams