*Club domestic league appearances and goals, correct as of 23:50, 26 June 2024 (UTC) ‡ National team caps and goals, correct as of 17:32, 14 October 2023 (UTC)
On 12 November 2014, Gerson signed a new five-year deal with the club.[6] He was subsequently linked to Barcelona, Atlético Madrid and Juventus throughout the year, but nothing came of it.[7]
Gerson made his senior debut on 22 February 2015, coming on as a second-half substitute in a 0–1 home loss against Vasco for the Campeonato Carioca championship.[8] He scored his first goal for the club on 8 March, netting his team's second in a 3–1 home win against Botafogo.[9] He appeared in 12 matches during the tournament, scoring four goals. Gerson made his Série A debut on 9 May 2015, starting in a 1–0 home win against Joinville.[10]
Roma
After being linked to several top European clubs in the winter of 2015–16, Gerson sealed a move to Italian club Roma on 4 January for around €15m.
On 27 November 2016, Gerson started his first game with Roma against Pescara.
Loan to Fiorentina
On 20 July 2018, Gerson joined Fiorentina on loan until 30 June 2019.[11]
Flamengo
On 12 July 2019 Gerson signed with Brazilian club Flamengo through 2023.[12] The €11.8m (R$49.7m) transfer fee made Gerson the most expensive Brazilian player ever signed by a Brazilian club at the time.[13]
On 9 June 2021, French club Olympique de Marseille announced that they reached an agreement in principle with Flamengo for the transfer of Gerson.[14] Following a successful medical examination, he signed a five-year contract with the club, and was presented with the number 8 jersey on 1 July.[15]
In November 2019 senior national team coach Tite stated that he was monitoring Gerson for a callup, having regretted not giving the player a call-up earlier that year. In December, Gerson asked not to be called for Brazil under-23 team to the South American qualifying tournament for the Summer Olympics to be held in January, citing fatigue after an intense season with Flamengo.
Gerson's decision was met with backlash internally at CBF and it has been rumored that his absence from the national team is due to that previous request, refusing the call-up for the under-23 team. However, his continued form with Flamengo, winning the Brasileirão, Supercopa, Recopa and Cariocão in 2020, and the Supercopa and Taça Guanabara in 2021, led to more requests from fans and the media for his call-up.
In May 2021, Gerson was eventually summoned to the Brazil under-23 team for friendlies against Cape Verde and Serbia the following month, ahead of the 2020 Olympics. On 17 June 2021, Gerson was named in the Brazil squad for the 2020 Summer Olympics.[19] On 2 July, however, it was announced that Marseille had vetoed his participation in the tournament.[20]
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Ten appearances in Campeonato Carioca, one appearance in FIFA Club World Cup, one appearance in Recopa Sudamericana, one appearance in Supercopa do Brasil