This repository contains a simple php script for extracting data from the GV100AD formatted file. It only extracts some base data. If you wish to have a more complete extraction: Take it and extend it at your free will.
Read more about the data format or get fresh data source here: Gemeindeverzeichnis-Informationssystem GV-ISys
There must be the GV100AD_300918.ASC file in your working directory. Then execute
$ php extract-gv100ad.phpto generate the ars.sql, ars.json and ars.min.json files.