Hugh.
Collector is an UWP application. It can't access virtual COM port directly. 
For GG04 to work with Collector, you need to download this tool: 
GPSComplete: GPSDirect,GPSReverse, LocationFixer GPS NMEA Windows 7 Windows 8 Windows 10 Sensor Driv... 
- Open the tool and Tap on Sensor Driver -> Install
- Select the virtual port you defined in the Com0Com application 
- Tap onto Comport Driver -> Install
- Select the NMEA message you want to receive (you will notice it doesn't have GST sentence, which means the accuracy report from the receiver will be missing)
- Then you can use Zeno Connect with Collector app. 
-Morgan