I've found also a GT-Sim.com.au site, the rate are in AUD.
But if you see in the FAQ there are:
"Which currency is the GT-SIM account kept?
All GT-SIM accounts are in European Euros. "
...so it's the same...
I'll waiting for the .de site, because it's ok for me
Thanks a lot
P.S. and "my cherry mobile"?