A Serial Communication Utility by Franson Technology AB

Use GpsGate with Garmin GPS 18 (USB)
The USB version of Garmin GPS 18 does not support NMEA, it only support Garmin's own protocol. Therefore very few GPS applications can use Garmin GPS 18. GpsGate solves this problem! You can connect GpsGate to Garmin GPS 18, and most other Garmin USB GPS receivers as well. GpsGate will make the Garmin GPS appear as a normal NMEA GPS connected to a serial port. And! You can connect any number of GPS applications to the GPS at the same time!

Share GPS over local network
GpsGate can be used to share one GPS connected to a Pocket PC or laptop to other computers connected to the same LAN. This can be useful if you have several computers in the same vehicle.
On each computer running GpsGate you can in turn connect any number of GPS applications, everything running at the same time.

Use GpsGate as a virtual null modem
GpsGate can be used as a virtual null modem. If you have two applications you want to connect to each other using serial ports you need a null modem. A null modem is bascially a cable to connect two serial ports to each other. Normally you need two computers or two physical ports on one computer to achive this. Using GpsGate you can emulate the null modem and run the two applications on the same computer without any additional hardware.

Use GpsGate as TCP to serial port proxy.
GpsGate can be used to redirect data from a TCP/IP port to a physical or virtual serial port. GpsGate can act both as a TCP/IP server and a client.

Developer's Guide GpsGate API
Using GpsGate API you can start GpsGate, send data to and receive data from GpsGate. For OEM licensees this API is also used to activate GpsGate. Among other things GpsGate API enables you to read and write data through GpsGate's virtual serial ports.

Applications can (of course) access or write data to GpsGate using any of the standard options in the GpsGate Settings menu, like serial ports, TCP/IP and UDP. The main advantage of using this API is that you can make sure GpsGate is started and you can access GPS data without knowing anything about how GpsGate (or the GPS) is configured.