In order to allow user interaction an user interface has to be provided - this is the job of the G Client Engine. It allows for the rendering of elements (that is, the forms of the elements) and should forward user input to the elements controlled by the user. The GCE builds directly on the GWE, this means that the user actually has a local GWE Server running which in turn connects to the other servers. GWE Server can handle primary and secondary elements. Clients will naturally have many secondary elements. As the current implementation is mostly for testing purposes, we would appreciate it very much if some volunteer with some experience in 3D programming would assist in writing a good client framework. We target at a very reusable client library. That means everyone should be able to write his/her own client or extend the given standard client to his own needs. The protocol will be completely open - as the whole software is. Thus everyone is able to create clients to personal preferences. Even clients without a GWE seem possible if the GWE protocol is implemented all the way.