Bagier was educated at Pendower Secondary Technical School (merged with neighbouring St Cuthbert's Grammar School to become its lower school in 1977) on Fox and Hounds Lane (off the A186) in Benwell, Newcastle upon Tyne. He served in the Royal Marines from 1941–5, as a gunner aboard the light cruiser HMS Belfast, and later played a part in her preservation. He was a signals inspector on British Railways. He served as a councillor on Keighley Borough Council 1956–60 and Sowerby Bridge Urban Council from 1962, and as President of the Yorkshire District Council of the National Union of Railwaymen.
At the 1964 general election, Bagier stood in the Sunderland South constituency, where he defeated the sitting Conservative Member of Parliament, Paul Williams. He held the seat until his retirement at the 1987 general election, when his successor was the left-wing journalist Chris Mullin.
He married Violet Sinclair in 1949. They had two sons and two daughters. He died on 8 April 2012.
- The Times Guide to the House of Commons, Times Newspapers Ltd, 1966 & 1983
- Leigh Rayment's Historical List of MPs [self-published source][better source needed]
- Andrew Roth (15 April 2012). "Gordon Bagier obituary | Politics". London: The Guardian. Retrieved 2012-04-16.
- Published on Tuesday 10 April 2012 09:14. ""Hero of Sunderland" Gordon Bagier MP dies – Local". Sunderland Echo. Retrieved 2012-04-10.
Hansard 1803–2005: contributions in Parliament by Gordon Bagier
|Parliament of the United Kingdom|
|Member of Parliament for Sunderland South