According to reports (e.g. here and here), German authorities have received numerous complaints about the use of Google Analytics – apparently affecting around 200,000 cases across Germany.
The background to this is the lack of clarity – within the scope of the GDPR – as to whether or under what conditions the use of Google Analytics can be based on a legitimate interest and when consent is required (pro memoria: The ECJ recently ruled i.S. Planet49, like any consent to the use of cookies is to be obtained, but not, when that is necessary).