Given the reference text below, what is a GATR?

The Guided Advanced Tactical Rocket (GATR) is a weapons system under development by Orbital ATK and Elbit Systems. It is intended to provide a low-cost guided missile compatible with existing unguided 70mm rocket launch platforms such as the Hydra 70.[1] The penetrating version of the GATR is equipped with a steel-cased M282 warhead and a programmable fuze. It can be set from the cockpit to detonate on impact or after a delay and is capable of penetrating a triple-brick wall and light-vehicle armor.[2]

A Guided Advanced Tactical Rocket (GATR) is a low-cost guided missile equipped with a steel-cased M282 warhead and a programmable fuze.