Morning George
Because this is a search of relatively recent data, there are limitations on what documents are available. However a search of the Occupation Registration Cards WWII show that there was no card for GH. At Least that proves he wasn't here in 1940. (By here I mean Jersey).
The only other thing I can think of searching is the rates list. This obviously only shows people who are paying rates but at least it's better than nothing.
I picked the 1938 rates list as a start and I found a G. Highton living at Aubern, Vingtaine de St Nicolas, St Peter. Working backwards I found that he first appeared in the 1934 edition. Remember this would refer to the previous year so the likely-hood is he lived there in 1933. The last list where he is mentioned is 1941 so again this would tie in with the start of the occupation in 1940.
There is no actual proof that this is your George but at least it's a starting point. Remember I can only search the Jersey records.
Stewart