How is isolation shown in The Great Gatsby with the character of George Wilson? Please include quotations.

George Wilson is a character that stands apart from the rest in The Great Gatsby. He is often perceived by others as 'odd' or 'strange' in the novel, and is always described as being a bit 'off'. He's isolated by his lack of friends and family, and by his personality. He never has any positive attributes, not even in terms of health. Even his general description does not inspire confidence: he "was a blond, spiritless man, anaemic". 

Myrtle is described with life and vigor, and tellingly went by "walking through her husband as if he were a ghost." She doesn't even turn her head when talking to him ["without turning around spoke to her husband in a soft, coarse voice."] Symbolically, he and his garage is covered with "[a] white ashen dust [which] veiled his dark suit and his pale hair" while Myrtle is not.

Wilson's strange 'otherness' is only furthered and deepened as the book goes on. One friend says "You're morbid, George", when he claims he "[has] a way of finding out" who killed Myrtle.

When asked if he has any "friend" that could be "[telephoned] for" after Myrtle's death, to help him deal with the grief, even his friend Michaelis knows he has no one. He thinks, "This was a forlorn hope--he was almost sure that Wilson had no friend."

Wilson never meshes well with other people, not even his wife--his friend even thinks that "there was not enough of him for his wife." He is conceptualized as a weak, almost empty person compared with the larger than life other characters [like Daisy and Gatsby]. 

Wilson is later described by some boys as "a man "acting sort of crazy", something which culminates in his murder of Gatbsy. Tom Buchanan tells Nick that Wilson tried to "force his way up-stairs" and was "crazy enough to kill me if I hadn't told him who owned the car" and that "[h]is hand was on a revolver in his pocket every minute he was in the house". 

Even Wilson's final act is a distant blow to someone who didn't have anything to do with him. He doesn't even kill the real perpetrator, in a sad and ironic twist. Wilson's entire life is a depressing, meagre existence that ends badly. He is apart from almost every character in the book, and has no confident and no one who loves him. He is isolated in every way.