And now, some news.
Oh, you thought he was dead? He spoke way too much for his spirit to not be around. They recreated him and it doesn't matter if you shot his face off in the Capital Wasteland.
He still speaks on a secret broadcast even with his new advanced reconstructive surgery, no matter how bad it hurts.
The PC has the choice to become a cyborg or full android. It's only the cybernetic implant in your head that allows you to pick up Three Dog's broadcast if you tune it to the correct frequency. Prepare for interesting quest possibilities if you decide to go this route.
It's all his plot for revenge if you ask me, but you didn't ask me so I didn't say that.
G.N.N. has some serious backing of Three Dog. Both becoming an android and wearing Power Armor is the only chance you have.