I have looked online and most of the programs supplied with the loggers seem to be limited to working with their own formats, although they all seem to export to the various gpx and kml, etc. Main problem is they don't import or open such formats which means thats it. Understandable given that the Ntrip software does so much within the program with the tracks from the minihomer, and very full featured given that its supplied freely with registered versions of the minihomer and not a lot otherwise.
I wouldn't suggest you copy Ntrip, but you should have a look at what it does as the program makes the use of the logger so much better and allows you to use a logger to the full. I haven't yet found anything (including google earth) that does the same with such simplicity and without leaving the program. You can see exactly what road you're on and where you're going where google earth is not so informative. Although datacenter shown the track and road names perfectly well, its usefulness is severely limited in comparison without a proper playback feature.
I honestly thought Globalsat would have wanted to lead in the software stakes and still think the DG-200 is great in its simplicity with a simple turn on and off to use, but it could have been a proper class beater with better software, for me anyway.