The Schloss Gobelsburg "Gobelsburger" bottlings are partly from purchased grapes, as opposed to the estate only fruit for non-Gobelsburger. But I think there is an error in the text here, as I am not aware of a "Gobelsburger Tradition" bottling (although I could surely be wrong). There IS a Schloss Gobelsburg GV "Tradition" bottling which is described thusly by TT in his Austria catalog:
"This is a deliberate attempt to replicate the style of 50 years agoconventional pressing on the skins, no must-clarification, no temperature control, and 18 months in old casks with frequent rackings to encourage secondary flavors. Its not a pastiche so much as an homage to an old dialect of white wine disappearing from the modern world."
This is what I believe you have drunk.