The site is a small public park squeezed between the Nerang river and the M1, the tree was undoubtedly there before the development of the highway.
To get a better idea of the extent of the development here I have put up a wider shot red dot is the subject tree, the red circle represents an area of relatively untouched riparian buffer that I will visit to get comparative shots of similarly aged trees...I have walked around this area quite a bit there are no other Eucs that have anything like this type of growth in the area to my knowledge.
So sure there would have been far greater numbers of similar sized trees around this one in the buffer before it was developed, and yes the odd growths could be dated tot he period of initial development perhaps....but the very significant grafting in scaffold limbs?