Title says it all, just wanna make sure that if I sell my bitcoin now that I'll still get my BTG.
Wallet: Electrum (if it matters, probably not, but doesn't hurt mentioning lol)
I think you have to claim your BTG first. I would suggest waiting until then to be sure. I also would wait a few days after the fork to do anything because there seems to be a lot of uncertainty about how everything will work. Its also very possible that the BTG isnt going to be worth very much anyway so it may not really matter.