It looked to fly up direct from Canberra and was noted to be using the radio callsign of "Envoy 30".
At the time of writing, it appears that the Falcon 7X bizjet is staying for at least the night at Gladstone Airport.
UPDATE! On Tuesday 13 July, A56-001 "Envoy 30" departed Gladstone Airport for Tamworth and then Canberra.
Photo taken by Steve Vit ©