AshOS used to ship with 3 installation profiles, one for minimal installs and two for desktop (Gnome, KDE Plasma). To make it more modular, we redesigned it and by default it only installs a bare minimum base snapshot. Once that is done, you can install any desktop environment you would like. For instance for GNOME, once booted in base snapshot, run:
The installation script is easily configurable and adjusted for your needs (but it works just fine without any modifications)