I asked him before, he said he won't release it.
The "UH1" Gunship thing is basically a Chopper Gunner.
I wouldn't take the risk of installing it though, if that thing flips its all over, your server, your save or build you were working on. Gone. In other words its bugged to a crisp.
That has never happened to me. Are you saying Gravity Cat made a malicious add-on?
Not it just has a bug that if you crash the server crashes