The Greek Orthodox Church belongs to the Orthodox Churches of Byzantine tradition. This is the difference between it and the Oriental Orthodox Churches, which separated from the Imperial Church centuries earlier. The members of this church in Germany are organized by the Greek-Orthodox Metropolis of Germany. It consists of 56 parishes nationwide and brings together mainly about 350,000 Greek Orthodox members with Orthodox members of other nationalities.

Further information can be found here:

http://www.orthodoxie.net/