GTK 4 and snap

Hi, It is possible to build GTK 4 app with snap?

I used with GTK 3, gnome extension 3.38 and core 20, but I don’t see any newer version that could support GTK 4.

You can build gtk4 as a part in your snap, however we are very close to landing core22 support in the gnome extension which includes gnome-42 a content snap that provides gtk4. I’d say way until snapcraft 7 is released.