Hi, Jacob2!
Good day to you!
About what is GIS, you can go to the following link to learn more.
https://en.wikipedia.org/wiki/Geographic_information_system
In the VCM, the GIS function as below:
GIS
The VCM can connect to ArcGIS. And the VCM5010&5020 can connect to ArcGIS 10.4 and SuperMap 8C.
Best wishes!