You could, however, IMHO the result would be that "Google Europe" (in my case, Google Ireland Limited) would notify that they and their subsidiaries have no dat

You could, however, IMHO the result would be that "Google Europe" (in my case, Google Ireland Limited) would notify that they and their subsidiaries have no data on you since they do not deal with your data in any way as you are the customer of "Google USA" and not their customer, unlike all the users Google thinks are in EU and switched their accounts/contracts/etc to the EU subsidiary. And if your data is processed by "Google USA", then GDPR applies to that processing only if you are "a data subject in the Union".