I've been struggling to actually put this one into words... so sorry if it's kinda crappily done. :P It was my 5th attempt. :P
"I'm in Witness Protection."
And no one ever asked him what it was he had witnessed. He was okay with that because that way he didn't have to tell them, didn't have to break his heart all over again with reliving those memories. If they had asked and had waited for an answer, he thinks he'd have replied with something like "I saw the end of God." Or "I watched Michael tear out his brother's hearts." Or "I watched the world's first Father destroy the world's first sons."
And that doesn't do the situation justice, doesn't do the memories justice, doesn't do them justice, but it's the best he would have been able to provide because no matter what he can't just say "I watched as God's second son was cast from Heaven by His first while His third lost all faith and His fourth ran like the coward they always knew he was. I watched as Heaven lost its paradise status. I watched as Lucifer was proved correct, the humans were flawed, they were murderous. I watched as they destroyed this beautiful planet. The most beautiful thing Father created and I watched them destroy it. I watched as Michael worked day and night making soldiers out of the Angels of the Lord for this pointless bloodbath against our brother. I watched Raphael fight with the Angels of the Lord even though he, the Lord's third son, one of the only four to ever lay eyes on God, gave up his faith and gave up his Father for dead. I witnessed the breaking of the first four and the absence of the Creator." He can't say that. He can never say that.
So when he's brought back from the dead, he goes back into Witness Protection under the name of Luca Hellson. And when there's a burning in his pocket from an amulet he retrieved from a wastebasket in an old motel as he's asked why he's in Witness Protection he says "Because my absent Father might decide He liked taking mine and my brothers lives and that He wants to do it all over again…" and the other person just stares at him before buying him a drink and saying 'I'm sorry, I'm so sorry.' Gabriel doesn't even tell him that he's just brought the Archangel his Dad's favourite drink… Gabriel is too upset, too lost in his own misery to notice the pain shining from the other mans eyes. Gabriel is too mixed up in his own sorrow to notice that, when the man just vanishes from the bar, the amulet in his pocket stops burning. Gabriel doesn't notice he's just looked into the eyes of his Father and told Him how badly He's screwed up, he doesn't notice he's just received the apology he's strived for years to hear. Gabriel just doesn't notice, doesn't want to notice.
Luca Hellson. Luca is another name for Lucifer and well Hellson should be obviously a link to a son of hell... :P I just like to think that if Gabriel needed to pick a new name, he'd want something that tied in with his favouritest brother. :P