In March 2022 Gantuya joined Tuv Buganuud from Ulaanbaatar City.
[1] Gantuya made two appearances for Mongolia in 2020 AFC U-23 Championship qualification.
[2] Gantuya made his Mongolia national team debut on 7 June 2021 in a 1–0 victory over Kyrgyzstan in the 2022 FIFA World Cup qualification.
[3] In June 2023, he represented Mongolia at the 2023 Intercontinental Cup in India.
On 11 June 2024, Gantuya scored his first international goal in a 2–1 win during the friendly match against Cambodia.