Gordon is a blue point siamese dumbo.
Gordon and Marco are somewhat linked.
When I adopted Marco, I was told he had originally lived with another rat, but the two had not gotten along and so had to be seperated, and the other rat was still at pets@home, waiting to be put up for adoption seperately.
Knowing full well that pets@home can't tell their arse from their elbow when it comes to rats, I was very suspicious of this apparent fighting between the two. I called daily to ask when the other rat would be put up for adoption, and one morning I was told he was.
I walked down to pets@home and there was Gordon, though they had named him 'prince'. Without a second thought, I adopted him too, and was eager for him to be reunited with Marco in the short time Marco had left. By this time, Marco was becoming quite ill, and was only a few days away from his euthanasia. Upon getting Gordon home, I let him meet Marco, interested in whether they would remember one another.
This is what they did:

It was clear that they remembered one another, and there was nothing but friendship between them.
Unfortunately, Marco had to be put to sleep a few days later, but Im happy that I gave him a few good days with his old friend.
Gordon is now the group omega, and is quite similar in personality to Genghis. Though he isn't quite so terrified of other rats as Genghis, and seems more laid back, he still gets the brunt of everyone's anger. Particularly, he and Ramsay don't get along. I put most of the antagonising down to Ramsay, as he tends to be a bit of a bully. So far, Gordon has recieved only minor cuts and wounds, and Ramsay tends to leave him along most of the time, but the two are often seen sizing one another up or exchanging dirty looks. I think the problem is that Ramsay is quite a low ranking rat himself, and the only rat lower than him is Gordon, so he picks on him because he can. He never picks fights with any other rats in the group. Happily, though, he and Ramsay seem to be getting on better these days. I don't think they'll ever be best buddies, but there seems to be no more scuffling.
Gordon is one of the rats that falls into the 'needs work' category. He is perfectly gentle and friendly, but not all that trusting of people and prefers to be left alone to do his own thing. I don't think he'll ever be an outgoing, cuddly rat but as long as he is happy, Im happy.
Why Gordon? Another Gordon Ramsay reference, obviously. Plus, I thought it was funny for him to go from a proud name like Prince to something a bit more geeky :P