@User what can be done with gaw right now is to enable tcp communication (as it is used to allow xschem to send selected signals to gaw) and use these commands to populate the window (after opening gaw and loading the raw file):

copyvar v(clock) p3 #rrggbb

to send node "clock" to panel 3 with color #rrggbb (1st panel in gaw is 0). I have made a rude test with netcat:

nc localhost 2020

copyvar v(out) p2 #ff00ff

and it worked.