Ground-Based Air Defence System --> Cant remember the exact details (was lined up many years ago to work on the project), but as far as I can remember the CSIR was behind this adaptation of the G-Chassis.
CSIR also had this demo vehicle (also G-Wagon based) at AAD 2016.
Another forum member contacted me offline and indicated he has been able to track down the owner. Apparently the owner still has plans to restore the G, just doesn't have time at the moment (seems to me he hasn't had time for quite a while...). As a result, the G doesn't seem to be for sale at the moment
I wish the owner would park it under a roof - to see a decent looking G stand out in the elements like this is just wrong