Yeah my question is not does facebook know your location (they do), but what criteria are used to determine if you are under the legal regime of the GDPR. If i

Yeah my question is not does facebook know your location (they do), but what criteria are used to determine if you are under the legal regime of the GDPR. If it's just the location you set, I would advise my non-EU friends to set their location to somewhere in the EU.