Rak5146 USB GPS and SF

i bought 20 RAK5146, assembled and connected to a remote chirpstack server.
As far as I can see it works ok, but it doesn’t send gps and I don’t know how to enable sf5 to sf12 in the chirpstack server?
I installed the firmware on rp4 from GitHub - RAKWireless/rak_common_for_gateway

Can anyone advise me on this issue?