It's real if you actually get "gaslighted", and strange things start happening and people you know come to you and start doing things that make question your sanity.

But it's not when someone sees 3 yellow cars in a row and screams gangstalking!! and stuff like that, but thats exactly the kind of response they want from a person actually being a victim from it. that's why there is probably no concrete evidence for it.

Like i wrote earlier it has something to do with causing the targeted person to have a psychosis, turning them into a moron and starting to believe things like those 3 yellow cars are a part of it.

But GS probably comes in many variations, it might be part of some kind of mind control operation or it's just some organization or person with lots of economic resources wanting to harm their enemies.