A Victron GX device and a GPS-capable 4G router would do the job, if you also have or plan on installing 4G Internet. But that only fully makes sense if you spec the whole system as a Victron system, otherwise you lose most of the functionality and benefits of the GX being able to talk to and control the rest of your system. You can also get a GSM and GPS 'dongle' for GX, but I feel it makes more sense just to install a 4G router that can do GPS, as that way you'll also have Internet (with a data SIM from a mobile provider)
That's the way I'll be going in the future, anyway, but all of my existing hardware (inverter, MPPT, battery monitor) is Victron. The 4G router I have is quite nifty for this sort of thing — it'll take unregulated DC in from something like 9-30V and so can by fed by the DC system directly with minimal bodging and no DIY electronics. It also does GPS, and is connected to a decent omni 4G/WiFi/GPS antenna on the roof.