A lot of the pre-WW1 military records on Ancestry are behind an additional pay-wall - Fold3. However if you have a sub to FindmyPast then they are included.
The amount of information can vary, but generally speaking you can expect more of an overview than any great amount of detail. There's often a physical description, and George is assessed as 19 years and 9 months old, 5ft 10 and 1/8th of an inch(!), 136lbs, chest min 36, max 38ins, fresh complexion, hazel eyes and black hair. Various moles, scars etc are also detailed.
He signed up with the Royal Artillery for 7 years 'with the colours' (ie regular army service) followed by 5 years in the reserves, joining at Liverpool on 7 Aug 1891, although he appears to have been transferred to the Royal Horse Artillery in Oct 1891.
Being in the reserves meant he could be recalled to service in the event of hostilities, which is exactly what happened in Oct 1899 (Boer Wars). He was recalled 7 Oct 1899 & posted on 9 Oct 1899... so it's probably not a coincidence that he married Elizabeth Florence Ewanson on 8 Oct 1899!
You should be able to see some medal records for him on Ancestry under service no. 85839. He was transferred back to the reserves in April 1902.
There is a pension record card for him on Fold3 giving the service number 690091 (Lillian was claiming as a widow). However, as there are no WW1 medals its probable that he didn't serve abroad during WW1.
