Gill was born on 14 December 1975 in Chandigarh.[1] He graduated from Shivalik Public School in Chandigarh and later from the DAV College in the same city. During his time at the university, he represented Panjab University.[2] He also represented Chandigarh at the junior nationals. He made a debut with the India men's national team at the 1995 Sultan Azlan Shah Cup in Malaysia where the country emerged as the champions. He played as a midfielder. An obituary at Olympics.com called him a "crafty midfielder".[1]
Gill was diagnosed with a brain tumour in December 2006, but after undergoing a surgery he continued playing at tournaments including the 2007 Premier Hockey League representing the Chandigarh Dynamos.[2][4] He also played the subsequent editions of the tournament with protective headgear.[4] His teammates called him Thabad (transl. gutsy) referring to his resilience in continuing to play after his diagnosis.[4] After his retirement, he continued to remain associated with the game, serving as a coach at a hockey academy at Shivalik Public school.[2] He was employed with Bharat Petroleum.[4]
Gill died on 26 January 2024 in Chandigarh, at the age of 48, 17 years after he was first diagnosed with a recurrent brain tumour.[5] He had had multiple surgeries for his brain tumour, and had gone into a comatose state a few days prior to his death.[4] He was married with two children.[1]
