[5][6] [7] In 1965, he was a member of the first successful Indian expedition team to climb Mount Everest.
[10] Singh has been described as "the first true Indian mountaineer", and in 2020, the Himalayan Journal noted "Gurdial climbed for pleasure, to enjoy the mountains in the company of friends, to savour the beauty and grandeur of the high ranges, not to find fame or bag summits.
"[11] Gurdial Singh joined The Doon School in 1945 and it was here that he was influenced by Englishmen such as John Martyn, R.L.
[10][12] Together, they scaled many peaks including Bandarpunch, Trisul, Kamet, Abi Gamin and Nanda Devi.
[11][15] He died following complications due to a hip fracture and chikungunya at his home in Chandigarh, on 30 May 2023.