No, this is not possible. The problem is that SSH never transfers frames, only controls and alike that are constructed on the system it runs on. So, if you run Gedit from Ubuntu to N900, Gedit will draw on N900's display, while Ubuntu wont handle processing the visuals. The same applies to GL. It will use the local X-server for rendering graphics, not the remote one. The conclusion is this: you cant play desktop games on N900 unless you use something similar to VNC. (VNC transfers graphics from an existing display, making it slower than SSH which transfers much smaller pieces.)