I would much rather have GTK+ make menus that can be pulled off to fit in better with my GNUstep or at least allow me to hide them so that I can reproduce the menus using WindoMaker's UserMenu function. I know this is possible, Midori allows me to hide the menu and it's WM_CLASS is set up properly so it works nicely with WindowMaker's UserMenu, intergrates very nicely with GNUstep.
Don't want OSX style menus either.
I only use GTK+ apps when I cannot find a GNUstep app that will do the job, I try never to use Gnome apps and the only Qt app I have on my system is twinkle, which I hope I will be smart enough soon to paste a GNUstep gui on twinkle's cli.
I think Midori would have been a better choice of browser in the GNUstep CD. I installed Chrome, opened it once and promptly decided it was the ugliest, most useless, Windoze clone of an abortion I had ever seen.
I can't address GNUstep on Windows as I will not allow any installation of Windows in my home.