We haven't done anything with the GPS data yet and probably won't with this generation of FlightFeeders. We're currently in the design phase for a Pi4 based kit with a brand new FlightAware designed SDR. Part of that project includes an Epic for what we're calling "Science Packages" internally. What you suggest fits in with that concept.
Edit: Or maybe support for ATC radio traffic? Again, it probably needs a second SDR, but it would make it much easier for those who are interested than it is now. I would love to be able to just run some daemon and get an audio stream on a local port and maybe an audio player in the web client.
FA / FR24 offering nothing in return but a fake enterprise account, a bunch of gimmicks, basically good marketing to trick fools into proving them 10 of millions of dollars in free data a month.
Suggest looking up https://www.adsbexchange.com/ and talking to them about hardware - that way everyone can make good use of the data instead of FlightAware and Daniel Baker getting rich from a business model based on extortion.
Absurd to me that people brag about hosting FlightAware or FR24 hardware while in reality all they are is getting fucked while FA and FR24 run off with bags of money.