Not really, because as you said, there really isn’t such a thing.
GDP is meaningless, and value is subjective,so there’s no possible way to objectively measure wealth. You can make some assumptions and derive some conclusions from a priori reasoning, and then use empirical data to support those conclusions, but there’s no way to assert or quantify “health/growth” in any meaningful sense.
This is basically the fundamental crux between Austrian methodology and every other school of thought.