Gomes, 18, joined the club's academy in the summer of 2019, and has signed a two-year deal at 1st Cloud Arena.
The attacking midfielder was an integral part of the young Mariners’ remarkable run to the third round of the FA Youth Cup in the 2019-20 season, scoring four goals including a dramatic stoppage time winner against Morecambe and a spectacular long-range strike against Harrogate Town.
He said: “I’m really happy and excited to have signed this contract.
“I feel like all of the hard work I’ve put in over the last two years has paid off to get to this point, but now I need to push on again.
“I can’t wait to see what the future holds for me at this club and it’s my responsibility now to make sure I’m ready to play in the first-team.”
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