No apology necessary Ferdi. The different GPS Receiver names get as confusing as the unit names sometime (there is no GRP-HS model GPS Receiver). I don’t know where your original post about the AS-GRP is at.


For future reference:
AS-GRP needs 6.300 or higher version software
AS-GPS-HS needs 6.570 or higher version software

The unit also has to be compatible with this accessory. Some units may receive these (or higher) levels of software but may still not be compatible. An example of this would be the 598ci HD Si unit which currently uses a software version of 6.640 but it is not compatible with either the GRP or GPS-HS GPS Receivers.