gpsd/systemd/gpsd.socket

[Unit]
Description=GPS (Global Positioning System) Daemon Sockets

[Socket]
ListenStream=/var/run/gpsd.sock
ListenStream=[::1]:2947
ListenStream=127.0.0.1:2947
# To allow gpsd remote access, start gpsd with the -G option and
# uncomment the next two lines:
# ListenStream=[::1]:2947
# ListenStream=0.0.0.0:2947
SocketMode=0600

[Install]
WantedBy=sockets.target