Send a GDPR request anyway. Many companies do not track what region their users live in, or what parts of it came from what regions, etc. They get a GDPR request and they just file it in the queue for processing. All they know initially is your name and e-mail when you send in the request.
"The Guidelines note that the processing of personal data of EU citizens that takes place outside the EU will not trigger the GDPR so long as the processing is not a specific offer directed at individuals in the EU or to monitor their behavior in the EU."
So it may be safe for google...but given it would apply to a user profile in general, including EU, maybe not?