There are a lot of fans with jilted girlfriend syndrome. They same affliction Greg had when he left coincidently enough. Now he's a bit older, and yeah, he's probably looking to land with a good team, but I do think he's being genuine when he says he screwed up and handled it poorly.
I can accept that, in fact, guys like that usually want to prove something. I think a receiver of his skill set could benefit this team and I think he'd be making plays again and everything would be fine. I think he probably wants and will get more money than GB would give to him so it's pretty much a non-issue, but if the price was right, he could come back and play and cheer just like before.