cgps uses gpsd which will likely break gps-share or gnss-share.
Only one of gpsd or g*-share should be given access to the /dev/gnss0 device at a time.
If you want to spoof gpsd on a system using gnss-share use something like this
#!/bin/bash
PORT=2947
SOCK=/var/run/gnss_share.sock
socat -d -d -d -lf /tmp/socat.log TCP-LISTEN:${PORT},reuseaddr,fork UNIX-CLIENT:${SOCK} &