After an unsuccessful stint at Roma, Fluminense youth product Gerson returned to Brazil after an €11.8million deal was agreed with Flamengo in July 2019.
The 23-year-old has since won the Campeonato Brasileiro, Copa Libertadores, Supercopa do Brasil and the Recopa Sudamericana, while the Campeonato Carioca could be secured next week with Jorge Jesus' side taking on Fluminense in a two-legged final.
Gerson's displays have led to links to some of Europe's biggest clubs, but he insists he is happy at Flamengo.
"After a year with Flamengo, I can promise that I never spoke with another club. My focus is totally on Flamengo," he told Globo Esporte.
"I feel at home, I am happy, I am wanted and I am at a club that is on the level of European sides.
"We can't shut doors, football shows this, but today I am very happy and fulfilled to be in the club of my heart.
"I rediscovered myself here and I want to win yet more trophies in this shirt."