No, Richard Gere didn't go undercover as a homeless person, so you can stop sharing that Facebook post.
Richard Gere, an actor who your mom thinks is quite good, did not go undercover as a homeless person and then give lots of homeless people $100. You might think he went undercover as a homeless person and then gave lots of homeless people $100 because that "news" is trending on Facebook, and a post about the stunt supposedly written by the actor has been liked more than one million times. (Update: The post has now, blessedly, disappeared, but a screenshot remains below.)
So, how can we figure out if this actually happened or not before we like a status one million times?
1) There's not even a blue check! Do you think acclaimed actor Richard Gere, star of The Mothman Prophecies and The Second Best Exotic Marigold Hotel, who your aunt finds very handsome, would not be verified on Facebook? If Richard Gere can't get verified, then how could all these boring normal people such as groundbreaking journalists and thinkers of our time?