A source close to Gomes told A BOLA his move to LOSC will be completed in the next few days.
He will then be loaned to Boavista in Liga NOS to gain experience in a competitive leage.
Lille’s plan is to build a team that can challenge PSG for the French title, and Gomes is part of that long-term vision.
Gomes made two appearances for the Manchester United first team last season.
However, following the arrival of Bruno Fernandes, he realised game time would be scarce and decided to move on.