[citation needed] Callum played rugby union for the Melrose Club.
Callum was selected for the professional All Blacks in their 1907–08 tour of Great Britain and Australia.
[1] Like all members of the tour, Gilchrist subsequently received a life ban from the New Zealand Rugby Union.
Callum barely played on the tour and instead assisted Albert Baskerville in an administrative capacity.
It was then reported in July that he was intending on moving to Australia to live.In 1916 he married Ethel Marrion Quodling.