you still have to comply with the GDPR. if not, you can be detained if (e.g.) your plane makes an unwanted stop in the EU. (this assumes, EU brought a GDPR comp

you still have to comply with the GDPR. if not, you can be detained if (e.g.) your plane makes an unwanted stop in the EU. (this assumes, EU brought a GDPR complaint against you or your company and you bothered to not respond)