I think thebandit's response, and yours, probably make the most sense. I'm not making excuses for Gilmore, or suggesting he doesn't have issues. But I certainly don't remember him being a "bad guy" in Buffalo.
But keep in mind, for those gloating and extremely high on T. White (as I am, as well), Gilmore had a pretty damn good rookie year, too. Come to think of it, so did Donte Whitner. (Now, I understand why fans were down on him, when he left the Bills, because he acted totally classless.)
I guess I'm far more interested in celebrating our early success (though we know how that can turn), than spending any effort bashing former Bills players.