@Adam: You should have in your KI a game called : "Paths to Kivas (Minkata)"
The hot keys F7 (add markers) & F8 (create a marker game) don't seem to be working in Gehn.
To create a new marker game, you need to click on the marker icon on your KI device. You won't see an invite windows like in MOULa (after pressing F8). You need to go in your age folder and you'll see the new created game.
To add a marker, you need to have your KI big screen open. It's not the best system but I guess marker game processes will be improved in future version of Gehn. It makes the whole process longer because, you have to literally stop. Open your KI twice, click on "add marker", then close your KI, and on to the next marker...
To delete a marker, you need to click on "delete" on your KI big screen just like in MOULa but then you won't be automatically transported back to the marker game main window, you need to click on the "back" button to do so.
The other functions seem to be just like in MOULa.
It would be great to test if the playability is there. In Edit mode, it works fine, I don't know if in Play mode, it goes fine or not.