Just put it in your GDPR disclaimer that you send all of your users online time, location, interest, activity on the site, and unique identifiers to attach thes

Just put it in your GDPR disclaimer that you send all of your users online time, location, interest, activity on the site, and unique identifiers to attach these data with other data to a foreign countries company for no actual reason; and if they don't want that they cannot do anything about it, and you are fine. Also the GDPR law is only 6 years old I think if you say you've never heard of it, you can get away with that.