It definitely is just a stupid rumor made up by Gaga-Haters. In fact, Gaga is a very religious person, although she may not always agree with her religion. Like in the "Alejandro" music video, when Gaga puts the rosary in her mouth, it symbolizes how her religion (she is Catholic) consumes her and is a part of her, but also how it constricts her from loving her gay friends. Hope the extra info helps! :)
No, GaGa is Catholic and in many of her interviews she talks about her love for God and Jesus and that when she dies, she hopes to go to a better place!
This is just another stupid hater rumor...Gaga is a lot of things but she is not a devil worshipper and if u dont believe any real lil monsters telling u this than look it up and shut up