Hailing from the town of Naharlagun in Arunachal Pradesh, Nikum got selected to play for his state in the BC Roy Trophy back in 2019 at the age of 15. After leading his team to the semi-finals, Nikum was scouted by Rajasthan United and was invited to play at their residen- tial academy. Nikum swiftly became part of the first team at Rajasthan United and in 2021, he became one of the youngest players and the first from Arunachal to feature in an I-League qualifier at the age of 16 when he took the field against Madan Maharaj FC.

Nikum’s breakout campaign in the I-League came in the 2021-22 season, when he showcased glimpses of his po- tential for Rajasthan United in their debut I-League cam- paign. Nikum featured in 14 matches out of 18, helping his club qualify for the Championship Round of the league. In the 2022 Durand Cup, Nikum impressed once again he scored a stoppage time winner against ATK Mohun Bagan and set up the goal against Indian Navy that ensured Rajasthan United’s qualification from Group B, on either side of a well taken goal against the Islanders.

In June 2022, Nikum was called up by the AIFF to take part in a training camp with the India U-20 side. Following the arrivals of Halen Nongtdu and Ahan Prakash, Gyamar Nikum joins a growing rank of young talent at Mumbai City FC and will be a part of the First Team..