Well, my setup is like this:
- I have my PC, with MC, and here i play my music most of the time
- I have a Raumfeld Connector, which streams music to my stereo
- And i have my phone (LG G2) which i use to listen to music on my earbuds
When using Gizmo, i don't have to setup any zones, it just gave me the option to play music 'Here' or on 'Raumfeld'.
So Gizmo seems based on device, rather than zone.
When i right-click the Media Server icon in my taskbar, i can select Raumfeld, so MC does see this.