G.A.T.S (Graffiti Against the System) Graffiti: writing or drawings scribbled, scratched, or sprayed illicitly on a wall or other surface in a public place. Has been around for centuries and has deep roots in the east coast. It has spread over the years and has impacted the lower poverty areas around the country. Take a deeper look into who GATS is, and why he chooses to deface government property. Also learn where he comes from and the massive influence of graffiti he has set.