Most sites promising free license keys for legacy software are fronts for trojans and data-stealing malware.
Franson GpsGate has transitioned into a much larger enterprise platform. Version 2.6 is effectively "abandonware" and is no longer supported by the original developers. Is GpsGate Still Available? Franson Gpsgate 2.6 License Key
If you are searching for a serial number or key generator (keygen) for version 2.6, you will likely encounter sites offering "warez" or "cracks." Here is why you should be cautious: Most sites promising free license keys for legacy
Allows you to share serial data across multiple ports. open-source alternatives. Legal and Modern Alternatives
For individual users who just need to split a GPS signal on a modern PC, GpsGate has largely been superseded by built-in Windows Location Services or free, open-source alternatives. Legal and Modern Alternatives