that sorta depends on what you mean by, “can this work in Cesium”?
You can get GPS and compass from the device and then pass them into the Cesium geo node and Cesium will pop to where you are.
I think Cesium also has a GPS to UE world space function, so you could feed in the GPS of an “item” and Cesium should be able to place it in that spot in the UE Level.
-e