GS has window manager of course, first was TWM, now I remember correctly,it’s dwm
for the historical reason, we have to switch to dwm because at that time there is no “stable” GPU driver for other window managers
since os v0.5 I think other WM will work too
and as the small screen of GS, Tiling Window Managers would be better, those can remove title bar, extremely lightweight, low memory cost