According to his attestation papers dated August 31, 1915 at Toronto, Gordon Henning Edgar was born on August 28, 1886 in Toronto. He listed his father Jas. Edgar, Mimico Beach, as his next of kin. He was a book binder and had 6 months of previous military experience. He was 20 years old and stood 5 feet 4 1/2 inches tall. He had brown eyes, fair hair and complexion. He was a member of the Church of England.
In the 1921 Toronto City directory he is listed as working at the Mimico Beach Hardware Co. and living on the north side of the Lake Shore Road, Mimico.