Gurdev Singh Kullar was born in Sansarpur, Punjab and studied at Cantonment High School in Jalandhar. His father, Thakur Singh, was in the Army and toured New Zealand and Australia with the Indian Army Hockey Team in 1926 (India's first overseas trip).
Gurdev Singh made his mark while a student in Jullundur. He represented India at the Youth Festival in Poland in 1956.
He joined Punjab Police in 1956 and played for Punjab Police and Punjab from 1956 to 1967.
He was a member the Gold Medal winning Punjab Team in National Hockey Championship in Bhopal 1962 where he was the Captain and Bombay 1965; Bronze Medal in Hyderabad 1961, Madras 1963 and Delhi 1964.
He was a member of the Gold Medal winning Punjab Police Hockey Team in All India Police Games in Gwalior 1956, Calcutta 1959, Hyderabad 1961, Trivandrum 1962, Jaipur 1964 and Guwahati 1966. He was in the Bronze Medal Team in Delhi in 1960.
He was in the Punjab Police team that won the Beighton Cup in 1966, scoring the winning goal against Signals team.
He was a member of India's Gold Medal winning team at Melbourne 1956 Olympic Games.
He played at the Tokyo 1958 Asian Games where India won the Silver Medal.
He was Captain at the Jakarta 1962 Asian Games where India won the Silver medal.
He retired from international hockey in 1962 and immigrated to the UK in 1967.
He played for Airedale Hockey Club and Bingley Hockey Club in Leeds, UK.
He died on 8 February 2024 in Leeds, England aged 90.