As a USAian, my rough impression is that it's similar to circuit splits in Federal courts. GDPR is a Regulation (not a Directive), so it's law in all EU states.

As a USAian, my rough impression is that it's similar to circuit splits in Federal courts. GDPR is a Regulation (not a Directive), so it's law in all EU states. But each country's court may interpret its requirements slightly differently. A ruling from the Court of Justice of the European Union (CJEU) would be binding on all member states. And in fact most rulings around Google Analytics are dealing with the boundaries of a CJEU ruling, Schrems II.