| Club: | Gençlerbirliği |
| Season: | 2019–20 |
| Manager: | Hamza Hamzaoğlu |
| Chairman: | Murat Cavcav |
| Stadium: | Eryaman Stadium |
| League: | Süper Lig |
| League Result: | 12th |
| Cup1: | Turkish Cup |
| Cup1 Result: | Fourth round |
| League Topscorer: | Bogdan Stancu (14) |
| Pattern B1: | _hb1819h |
| Leftarm1: | ff0000 |
| Body1: | ff0000 |
| Rightarm1: | ff0000 |
| Shorts1: | 000000 |
| Socks1: | 000000 |
| Pattern B2: | _nikelegend1920rw |
| Leftarm2: | ff0000 |
| Body2: | ff0000 |
| Rightarm2: | ff0000 |
| Shorts2: | 000000 |
| Socks2: | 000000 |
| Pattern B3: | _nikelegend1920wr |
| Leftarm3: | ffffff |
| Body3: | ffffff |
| Rightarm3: | ffffff |
| Shorts3: | ffffff |
| Socks3: | ffffff |
| Prevseason: | 2018–19 |
| Nextseason: | 2020–21 |
The 2019–20 season was Gençlerbirliği's 97th year in existence. In addition to the domestic league, Gençlerbirliği participated in the Turkish Cup.
See main article: 2019–20 Süper Lig.