Last time I looked, GNUStep was really, really, really buggy reimplementation of 2000-era macOS... sorry, Mac OS X back then... toolkit. I say really 3 times,

Last time I looked, GNUStep was really, really, really buggy reimplementation of 2000-era macOS... sorry, Mac OS X back then... toolkit. I say really 3 times, because I really tried to port a MacOS-only terminal app (don't ask) to Linux, and I failed miserably on very basic functions. I guess I should have tried more, make minimal examples and report that, but I never bothered. It's what I would do now, anyway.