Ancestry has an entry for a George Bowden of 4 Gilpin Place, Fore St, Exeter, service number T2/13654 in the RASC (i.e. Royal Army Service Corps - the Royal bit was added in 1918), in the UK, World War I Pension Ledgers and Index Cards database, but there is only a small image on Ancestry itself and the proper images are on their separate military site Fold3 (or Forces War Records):
https://www.ancestry.co.uk/discovery...=successSource
On the corresponding medal index card, it says he was a Driver and he qualified for the Victory medal and the British War medal:
https://www.ancestry.co.uk/imageview...ce&pId=1678708
If you can't view this on Ancestry, it is free to download from the National Archives website if you make an account and log in (it says £3.50 but when you log in it will be free):
https://discovery.nationalarchives.g...ils/r/D1418330
The service papers are available on Ancestry (they will also be on Findmypast) and give his age as 25 when he joined up in 1914, and his birthplace as Chagford, Devon. But his occupation is baker, so I'm not sure whether he is the right person! This is the link to the first page on Ancestry, then you can go through the other pages from there:
https://www.ancestry.co.uk/discovery...=successSource
It says he married Amy Dyer 16 Jun 1915 so I guess you will know from that whether it's the right record.