...but hopefully not out.
I've decided to take down Googomi and delete all the data therein until it can be made GDPR compliant. The data the app collected, specifically links to public Google+ posts and the email addresses of the registered users, is used solely to generate the RSS feed and notify users of expired authorisation tokens.
However work needs to be done to clarify this and to prevent users who are 16 or under from giving consent, which is not allowed under GDPR, so I felt it best to take the whole site offline and delete the data until it could be rebuilt with GDPR in mind.
If and when it comes back I will announce it here.