Dexcom BYODA - pachi81/GlucoDataHandler GitHub Wiki
For Dexcom G6, you can create a patched Dexcom app sending a local broadcast to other apps.
The Dexcom BYODA can be created here.
To receive values from Dexcom BYODA in GDH you have to enable broadcast to xDrip+ or both (xDrip+ and AAPS) while building the app.