Before my arrest (CFAA) I operated on Tor and PGP for years. I had property seized and I had a long look at my discovery material, as I was curious which elements they had obtained.
I never saw a single speck of anything I ever sent to anyone via PGP in there. They had access to my SIGAINT e-mail and my BitMessage unlocked, but I used PGP for everything on top of that.
Stay safe!