@TomWS, to be honest, I don't know. I'm using the following Adafruit product:
Adafruit Ultimate GPS Breakout - 66 channel w/10 Hz updates - Version 3 - PRODUCT ID: 746
In the Technical Details section, it says this:
"DGPS/WAAS/EGNOS supported"
I'll look through the examples and the provided libraries....hopefully they will have support for this option.