As the linked article (and the API docs linked from that article) indicates, it contains a Google user ID, which is unique to a user. That by itself already makes it PII.
Furthermore, you probably know the IP of the user you're serving a page to, that combined with this data also makes it PII..
It's not about wether you can determine the person's name, mail address or whatever, it's wether this combination of data is or can be unique to a single person.
Furthermore, you probably know the IP of the user you're serving a page to, that combined with this data also makes it PII..
It's not about wether you can determine the person's name, mail address or whatever, it's wether this combination of data is or can be unique to a single person.