Thomas Gilchrist Gilmour was born in Irvine, Ayrshire, Scotland on 3 December 1881 and was articled to Donald Bruce (1834-1919) and Edward A. B. Hay (1855-1934) of Bruce & Hay in Glasgow in 1897. He was then Clerk of Works for Bain & Co. in 1900-01; an improver with John Ure MacDurslaw in 1901-02; assistant to John Fairweather (1867-1942) in Glasgow in 1902-03; and an assistant to Glasgow Corporation Office of Works from 1903. He subsequently continued to work for Glasgow Corporation Office of Works in the capacity of architect until at least the late 1920s.
Gilmour qualified as an architect in 1912. He was elected an Associate of the Royal Institute of British Architects (ARIBA) later that year and a Fellow of the Royal Institute of British Architects (FRIBA) in 1928. He died in Cambuslang, Scotland on 11 November 1966
Architectural work by Gilmour included Govan Baths and Washhouses in Govan, Glasgow (1920); Shettleston Hall and Public Library in Shettleston, Glasgow (1921); Whiteinch Baths and Washhouses in Whiteinch, Glasgow (1923); Whiteinch District Library in Whiteinch, Glasgow (1923); Shettleston Baths and Washhouses in Shettleston, Glasgow (c.1924); and, with Thomas P. M. Somers, Kelvin Hall in Glasgow (1926-27).
Directory of British Architects 1834-1914. Compiled by Antonia Brodie, et al. Volume 1: A-K. London; New York: British Architectural Library, Royal Institute of British Architects/Continuum, 2001
‘Obituary’. Building vol. 211, 25 November 1966 p.86