The RD30 is primary role is a Remote Display and it will show any supported NMEA data that it receives. No setting you make within The RD30 will change that. If it understands it and receives it; it will display it. You can leave the settings the way you have them now. The the GP32 there are only three NMEA output selections for Data 1 you have wired. REM1, REM2, AP. These are explained on page 57 of the operator's manual. The table on page 56 shows the NMEA sentences provided based on these three options. If you want to display everything possible from the GP32; I would use the AP setting.