GPS - Adjusted approach for managing GPS

overlay/etc/default/gpsd

@@ -1,4 +1,16 @@
-START_DAEMON="true"
+# Author  : Gaston Gonzalez
+# Date    : 4 October
+# Purpose : GPS configuration for EmComm Tools
+
+# Prevent starting automatically by systemd 
+START_DAEMON="false"
+
+# Prevent the default udev rules from starting gpsd.
+# Custom ET udev rules trigger gpsd
 USBAUTO="false"
+
+# Always use
 DEVICES="/dev/et-gps"
+
+# -n should be used when using GPS as a reference clock
 GPSD_OPTIONS="-n"