There is some confusion whether his name is Stanley Gordon Boyton or Gordon Stanley Boyton. Both versions are used in various registry documents.
On the Australian War Memorial Website he is known as Gordon Stanley Boyton. Details of his war service are from that site.
Gordon Stanley Boyton served in the 54th Battalion of the AIF during World War 1. He enlisted on 29th May 1915 and was Killed in Action 3rd May 1917 at Bullecourt.
Cousins Roy Harold Boyton and Leo Milton Boyton also served during WW1.
Roy Harold Boyton served in the 17th Battalion was Killed in Action at Polygon Wood 26th September 1917.
Leo Milton Boyton returned to Australia safely.
The link shown is to the Australian War Memorial collection for a search of Red Cross records into wounded and missing. http://www.awm.gov.au/research/people/wounded_and_missing/
A search will find records of witness statements for the deaths of Gordon Stanley Boyton and Roy Harold Boyton. Also included are scans of hand written letters from Leo Milton Boyton asking for information about his brother Roy and cousin Gordon. The documents are "matter of fact" for the time and circumstances they were written but today may be found very moving descriptions of the loss of these two young men.