This smell troll, but let's apply some logic to it.
"I want to get this out in the open because it is the kind of thing that will generate conspiracy theories", Gavin Andresen
Gavin is a person that obviously likes to go to conferences, to do talks and so on. Even though he's a coder, he also seems to be a people person. I think he actually got personally excited to go talk to the CIA.
It's not uncommon that high profile people in something like bitcoin will draw the interest of governments. He got an invitation to speak, accepted it, and no transcript exists, which is not uncommon for such arrangements.
Satoshi not responding anymore after Gavin mentioning he went to see the CIA. It might be a coincidence, it might not. I think the most logic assumption is that it is not a coincidence. Whereas Satoshi needed no publicity, Gavin was the opposite. Satoshi would probably never have gone to the CIA to speak, and that's probably why he do not fancy anyone else doing it either. It's not a long stretch to imagine he'd drop the ball there and then in regards to mailing with Gavin.
Being a part of the TBF let Gavin do what he enjoys most, to write code and get a salary. Now he has joined MIT's Media LAB and he will continue to do the same, and have access to other academics that he can communicate with, I assume it also gives him a paycheck. He gets to do what he likes the most, and he gets paid..
Please read
https://bitcointalksearch.org/topic/permanently-keeping-the-1mb-anti-spam-restriction-is-a-great-idea-946236 for a great post, to get insight in these matters. I do not think Gavin is an agent. He might be, but even if he was, all the code he writes will still be viewable, so if he did something openly hostile, it would most likely be spotted, and it would be a major outcry and he'd instantly lose all trust. Other devs would take up the work, and Govcoin or Gavcoin might get traction, but there would still be Bitcoin.
Since there's no hard and factual evidence here, and there's been no proper research apart from posting a few links that does not prove anything, this thread is over the top FUD.