Hi Carol,
I'm no expert on Divorce at all but as I understand it you had to be very wealthy to obtain a divorce in Victorian times, as it was considered a very bad thing to do regardless of the circumstances; were your ancestors wealthy ?.

These links may help you interprete whether or not a divorce would have been a likely/practical cause of action for your kin.

http://www.123helpme.com/women-and-divorce-in-the-victorian-era-view.asp?id=154377

http://www.st-andrews.ac.uk/~bp10/pvm/en3040/women.shtml

http://www.historyofwomen.org/divorce.html

I briefly looked-up this subject c2011 and I think I read somewhere that one place to search for Divorce records was the London Gazette newspaper, but I'm not certain about this ?.
https://www.british-genealogy.com/threads/56808-How-Do-I-Find-Divorce-records-online

Since then I see that Ancestry have now digitised Victorian Divorce records, see http://www.whodoyouthinkyouaremagazine.com/news/explore-thousands-divorce-records-ances...
Looks like the bare-bones of their records are available on the National Archives website.
http://www.nationalarchives.gov.uk/help-with-your-research/research-guides/divorces/

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Irrespective of whether George did divorce or not, and sorry for not fully-following this thread, please remind me when and where his marriages apparently took place, to hopefully help us to find records ?

Hope this helps you, J