IMHO, this is a great example of what a Gnome desktop should be like, at least by default. The rest of my family might actually be able (and willing) to use this.
Zorin is based on KDE, a Linux desktop environment. Typically looks like Windows but here they have put effort into making it look nicer.
Do you have a reference? The screenshots look like Gnome.
It is built on Gnome (3.38). The Zorin taskbar looks based on the Dash To Panel extension. Zorin ships with Gnome or XFCE for the light edition. There is no KDE spin.