Likely not natural to the Isaacs Pines area, rather spreading from plants previously planted. However, does look good for G. juniperina, which is native to the ACT.
Thanks Rainer. I think the original plants were there before the suburb and in a rocky patch that might not have been planted with pines in the 1950s. The younger plants have been spreading since the pines were cleared in 2002/3. Of course the pines are growing back too.