Why should you hear gospel songs if you are a Satanist? I mean we have so much music that is not about that vomit of Christ....
However, it depends on why you listen to it. If you open yourself up to music and the Christian God, yes, you are opening yourself up to harmful negativity. If someone puts it on in the background because they're an idiot, you're not opening yourself up to those curses, so don't worry.