No, Forrest Gump is not a true story. The 1994 film is based on a 1986 novel by Winston Groom, who made Forrest up entirely. But here’s the kicker: Groom did borrow from real people and real events—just twisted them into a fictional pretzel. Think of Forrest as a mythical character who happens to stumble through actual history.
For example, Forrest teaches Elvis Presley how to shake his hips. That’s pure fiction, but the real Elvis did get his moves from watching black performers in Memphis. So Groom swapped in a white, slow-talking kid from Alabama. Smooth move, Winston. Smooth.