False gospel. False religion.?

Religion is a set of beliefs. There is no ability to "prove" or "disprove" most of it, so the idea of "false" gospel is nothing more than an opinion.

There is no such thing as false religion, just different ideas of it.

Mat 15:7  You hypocrites! Well did Isaiah prophesy of you, when he said:
Mat 15:8  "'This people honors me with their lips, but their heart is far from me;
Mat 15:9  in vain do they worship me, teaching as doctrines the commandments of men.'"

Pretty much. Then again, many folks don't know what gospel means in the first place.

Galatians 1:6-9 addresses it somewhat. Can you think of any religions that started up from an angelic revelation?

lot of that going around