The London-born former Manchester United player collided with Reims defender Amadou Kone, who was subsequently sent off for the challenge, in the 11th minute of the game.
Players from Lille and Reims immediately called for the medical staff as team-mates placed the stricken Gomes in the recovery position and formed a circle around him.
Both sets of supporters at the Stade Auguste-Delaune sang Gomes’ name as he was attended to.
There was a lengthy delay to the match while the 23-year-old received treatment before he was strapped to a stretcher and carried off the pitch.
Lille said in a statement on their X account, external that Gomes “has regained consciousness and has been transferred to hospital”.
The match restarted in the 45th minute, with 34 minutes added to the end of the first half.
Gomes joined United in 2006 aged six and progressed through their academy ranks to the first team.
He made his Premier League debut in May 2017 against Crystal Palace and went on to make another nine appearances in all competitions.
Gomes joined Lille in August 2020 after he was released by United.
He won 18 caps for England Under-21s between 2021 and 2023.