I do not think it is aviation grade
You mean over-priced, under performing and without validation or redundancy?
Australia does have WAAS beacons, but they point to sea for marine use
I don't think that is WAAS, but rather a completely separate system and you need a special receiver, just a normal WAAS one won't do. Farmers use a GBAS too for auto-steering their tractors, but again: not WAAS.