Comment by cookiengineer

I hate to break the news to Google, but this will likely be ruled illegal. The relevant German news of the court ruling that makes requiring a Google Account to use Google Services illegal:

https://www.zdfheute.de/wirtschaft/unternehmen/gmx-google-pl...

Rechtsprechung (court decision of LG Mainz, 22.08.2025, 12 HK O 32/24), text isn't published yet as of today:

https://dejure.org/dienste/vernetzung/rechtsprechung?Gericht...

If you search for the Aktenzeichen ("12 HK O 32/34") you'll find other news sources that confirm this.