Mayer Gil was eligible to represent
Colombia, where he was born, and
El Salvador through naturalization. He previously was called up for
El Salvador U20. He played for them during the
2022 CONCACAF U-20 Championship. He made his senior debut for
El Salvador on November 16, 2022 against
Nicaragua as a substitute in a 1–0 friendly loss. His debut in a competitive match came against the
United States on March 27, 2023 as a substitute during the
CONCACAF Nations League in a 1–0 loss. ==Personal life==