Yes, the GPS aka SatNav systems are back in the Aussie Spaceships Universe.
You can add them to your booking when you book your Spaceships campervan or later via the Online Check-in Portal.
But if you prefer to use your own smartphone as navigation device you can do that without having to worry about mobile data in Australia.
A lot of map apps have offline mode so you can download NZ maps before starting your road trip. Some of the map apps that have this feature: Maps dot me, Google Maps and Organic Maps.
Get mobile data at a great rate with and eSIM via the Spaceships Easy eSIM Connection.