Lunar - The BlackBerry Preservation Project

BlackBerry 10

When it comes to maps, there are many apps to choose from on the apkmirror website. If you use the Cobalt Play Store, you can most likely get Google Maps working.

Side Note: Using maps on BBOS 7 and earlier used to be possible with MGMaps, but it no longer appears to work. That said, it could still be worth checking out, as your mileage may vary.