According to Sky Sports, the player has already completed his medical with the London giants.
The player will join on an 18-month loan deal and Spurs will have the option to sign him permanently for a fee of around £56m in future.
It will be interesting to see how he performs in the Premier League now. Gedson was linked with a move to West Ham United as well.
Mourinho needs some January reinforcements and Gedson Fernandes could prove to be a handy option.
The 21-year-old attacking midfielder will add creativity to the side.