The then 19 year-old striker moved to City for an initial fee of £27m plus bonuses, signing a deal to 2021 in the process.
Since then, Gabriel has become a world-wide name, helping City win six trophies over his first four years with the club. He signed a new deal in 2018, which now runs to 2023.
Relive Gabriel's first days with City - including a first training session with his new teammates.
Watch below (and for more videos click here):