I have a GETAC PS236 with FG, and works nicely with RS2+ at least.
However, I really like more modern choices by now. A good, weather-sealed 8-9 inch tablet with FG for Android is a muuuch better experience.
Reach RS+ and RS2 can stream their correction data over Bluetooth in NMEA format. If these types of field controllers can receive data in this way, it should work well. You can check our guide to see how can you set up our receiver to work with FieldGenius.
If you prefer SurvCE, you can connect Reach as a generic NMEA device to work with it.