It's alright, and way better than Electron Cancer.
For Gambas models, does it have built-in models that can update their own views or is it all retained mode like all the other GUIs. The one big advantage of web frameworks seems to be how they're immediate mode (using things like the Shadow DOM) so you don't have to emit state changes. It doesn't seem like they're very many non-web based GUI toolkits which can do that (which aren't minimalist and meant for games)
Yeah. I'm waiting on Red, but have been waiting a long time.
On another note, one commercial option that is very cheap (like $250 for a professional license that is perpetual for that version and collects $0 royalties), but can build GUIs for (Windows, Linux, OSx, Raspberry Pi, Android, and iOS) and has very good built-in database support, encryption, audio, assembly...etc is the forth based 8th language. You can get source with an NDA and $2500 if you really need it. I've only played with it so far, but it is crazy fun and has a lot of built-in goodies. The author fixes many bugs in like hours and will push a new version same day for zero cost.
Yes. It basically outputs the executable binary for the target you choose when compiling your Haxe code.
It means you write Haxe source and the 'compiler' (transpiler, actually) generates code for the choosen target. It will then compile the generated code using the target compiler installed in your system, if necessary (when you target C++, for example).