The callsign is assigned by Ronnie RAAF. I would suggest that Little Johhny wasn't even aware of it. And I would further suggest that if the GG has the right to it then he should be making all of the decisions and doing the hard yards instead of reviewing parades and having tea parties.
Ferris, and WS. Your suggestion that the GG is REALLY in charge is just plain stupid. The PM (whoever that may be) is the guy in charge. The position of GG is ceremonial, despite what Gough will tell you. The callsign SHOULD be with the PM.
Now grow up and find something interesting to debate. Like Jetstar.