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you can try resetting the GPS and monitor the status of the antenna when it starts back up.
You will need to open two terminal sessions
1. First, stop gpsd
sudo systemctl stop gpsd.socket
2. view the GPS console with minicom in session 1
minicom -b 9600 -o -D /dev/serial0
3. in session 2, send a reset command to the GPS
echo -e -n "\xb5\x62\x06\x04\x04\x00\xff\xff\x02\x00\x0e\x61" > /dev/serial0
4. In minicom, confirm you get these three lines. (there will be other NMEA in-between)
$GNTXT,01,01,02,Resetting GNSS*3B $GNTXT,01,01,02,ANTSTATUS=INIT*3B $GNTXT,01,01,02,ANTSTATUS=OK*25
The last check is to have nothing else connect to the Raspberry Pi and have it outside with clear access to sky (not near a building or trees) and the GGPS facing skyward . Leave it for 1hr. You will be able to tell if it gets a fix because the LED will start flashing.
Mark --OzzMaker.com --