there is a family history "Gorry a family search" held by both IoMFam Hist soc and the Manx Museum - dates from abt 1970 - their strong suggestion is that Wm Gorry was a 'taxman' (ie collector of taxes) on Ulva which is a small Island off north west coast of Mull - now the Island is private as the population left c 1823 - but c 1796 the Clan chief Lughlin finally ran out of money and his creditors foreclosed on him + thus his officials were out of a job - the Gorries they thought were a branch of the MacQuarries + came from Mull, Ulva or another small Island called Gometra

I can't see a link for a George in the line from Wm but possibly a brother to Wm ?