Iceland have a _geneological_ database, which is something of a sensible precaution against consanguinity in a small gene pool that was isolated before air travel. I don't think anywhere has population-wide genetic databases and I struggle to see how it would be compatible with GDPR?

(France actually ban paternity testing without a court order!)

> I don't think anywhere has population-wide genetic databases and I struggle to see how it would be compatible with GDPR?

Because the GDPR is only concerned with data collection not explicitly required by law. If a government passes a law to set up a genetic database, then that it totally fine with the GDPR.