What's German for GMail?

I just received this very interesting message when trying to access my Gmail account:

It's interesting for a couple of reasons. Firstly, I'm not in Germany. I'm actually in London (Heathrow airport) on my way to Dublin. I am using a T-Mobile hotspot to access the internet so it must be routed through Germany. You'd think they'd use IP filtering to work out my location though, like this example I blogged a while back.

Of greater interest is the underlying reason for this message. Clearly there's some sort of problem with ownership of the GMail name in Germany (but not the gmail.com domain which Google own globally). Too bad they don't tell you on this page what it's all about. I hate an unsolved mystery!