customize server in GPS Tracker
Your question is a bit ambiguous, but I think what you're asking is:  Is there a way to track entities that send out location information by having them send their data to a server?

Essentially, you need some method of:

A) Figuring out where on earth you are (you use a GPS receiver for that)

B) Way to send that information to like a server somewhere.

C) A server that handles and manages that information.

APRS, an amateur radio service, supports doing this.  For example, from reporting stations, you can plot their locations on a map.