Not only emergency services have such software, commercial companies use fleet management systems with geolocation support too. There is no standard API, you indeed have to use scripting to deliver the geolocation information from the rolling stock to the fleet management system. There is an example on the manual pages.
Yet another possible use is to provide real time information to networks not connected to internet, but don’t expect stratum 1 quality.
In case of LtAP mini, don’t forget that an external GPS antenna is a must, not an option. The “big” LtAP looks happy with the internal one in my attic under roof tiles made of concrete.