server system: Ubuntu 12.04.2 (using ppa:x2go/stable)
client system: Windows 7 64-bit, tested with latest x2goClient (18.104.22.168) and PyHoca-gui (0.4.0.1)
When starting up a UNITY-2d session, the screen dimensions given in the client profile settings are ignored, and a window as large as the display is created. If there are two monitors, the window will span both monitors.
I've tried this both in x2goClient and PyHoca-gui, and the behavior is the same, so I'm guessing this is a server problem.