For some time now I am using my gk802 device as headless server running Debian Jessie. Finally I have decided to remove all GUI related packages from the system.
After searching the net I found out that this can be accomplished with:
apt-get --purge remove x11-* apt-get autoremove
This is not the prettiest solution, since others mention using tasksel to purge desktop packages with
apt-get purge $(tasksel --task-packages desktop)
but my tasksel –list-tasks showed that none of the tasks were installed.
And of course if you want to purge old config files that are still remaining on the system you can use:
dpkg -l | grep ^rc | cut -d' ' -f3|xargs dpkg -P