Sir Gilbert Joseph Cullen Dyett CMG (23 June 1891 – 19 December 1964) was an Australian soldier, veterans' rights activist and National President of the Returned Sailors' Soldiers' and Airmens' Imperial League of Australia (1919–46), forerunner of the present Returned and Services League of Australia.
A First World War veteran of the Gallipoli Campaign, Dyett also served as Dominion President of the British Empire Services League from 1921 to 1946, and was secretary of the Victorian Trotting and Racing Association for 30 years from 1919 to 1949.
He was appointed a Companion of the Order of St Michael and St George in 1927, and was made Knight Bachelor in 1934.
Dyett died in 1964, aged 73, following a long illness.
In 2003, a display on Dyett was created for the Eternity Hall at the National Museum of Australia. A collection of Dyett's memorabilia was unveiled in 2006 by Dyett's nephew at a dinner to celebrate the 90th anniversary of the founding of the Bendigo and District branch of the Returned Services League. The collection, normally housed in a vault, includes war medals and photographs, as well as Dyett's writings.
- RSL (Victorian Branch), eMelbourne, accessed 22 January 2010
- Dyett, Sir Gilbert Joseph Cullen (1891–1964), J. N. I. Dawes, Australian Dictionary of Biography, Volume 8, Melbourne University Press, 1981, pp 393–394.
- It's an Honour: CMG
- It’s an Honour: Knight Bachelor
- Sir Gilbert Dyett Dies, 73, The Melbourne Age, 21 December 1964
- Australians recorded for Eternity, National Museum of Australia, Canberra, accessed 22 January 2010
- RSL pays tribute to unsung hero, The Bendigo Advertiser, 12 August 2006
- Artwork of Dyett (Australian War Memorial)
- Photograph of Dyett laying a memorial wreath on Armistice Day 1943 (Australian War Memorial)
- Gilbert Dyett: architect of the R.S.L., 1992 MA thesis by Morna Sturrock
- Biographical cuttings on Sir Gilbert Dyett