By Kandy07/06/2018This GPS/Compass is for APM flight controller but modifying a litle it will work perfect with SPRacingF3 board. First I replaced the connectors after that remowed the IC (see pictures) from the pcb and add 2 jumper wire. Works great with INAV 1.8. Compass IC is AK8975, the gps in Ublox mode has 5-6Hz update rate (by default) and rapidly localize. Indor near window gets 5-6 sat and outdor 15-17 sat.
You can get more info here: https://github.com/iNavFlight/inav/issues/2619
By Rafe29/06/2018not tested yet. but i think these images are helpful