Networking - and software in general - can be extremely complicated.
Rather than risk having to buy the Full Version of GPS2IP, you can download the free 'Lite' version, and check that it works in the way that you want.
When you have confirmed GPS2IP is the solution you need, simply upgrade to the Full Version with confidence!
If it's not what you need, or not working
If it is not what you require, just delete the 'Lite' version - and you have lost nothing!
Tryout GPS2IP Lite first to make sure your setup works, then upgrade to the Full Version GPS2IP for full functionality.