No, legislation (the GDPR) doesn’t say anything about cookie pop ups. It says that private data (or any kind) can only be used with opt in consent, given freely, with no strings attached, with the ability to be withdrawn, that it will be kept secure, deleted when not needed for the original purpose, etc. All very reasonable stuff. Tracking cookies are affected, but the legislation covers all private data (IP, email address, your location, etc) … And if Browsers agreed on a standard to get and withdraw opt-in consent, it would be compatible with what the legislation requires.