Comment 2 for bug 1389336

Seb, That is correct its no longer possible to provide custom providers, so it would either require teaching the ubuntu GeoIP server the Geolocate API or merging ubuntu-geoip directly into geoclue as a location source.

There was a one point a geoip client in geoclue-2.0 but it got dropped when GNOME switched to using Mozilla Location Service. It should be possible to do something similar for ubuntu-geoip support
http://cgit.freedesktop.org/geoclue/commit/?id=b6563179f55b44b9b566c11c8c4bc0870d50879f