You have probably noticed
The referenced article link goes to the old forum, of which there is archive in
You should divide that into two parts:
- Getting GPS connected to the ntpd and the time of the router itself adjusted properly.
- Propagating NTP time via ntpd to others.
If the first goes ok, (like it almost sounds above), you are actually just asking about ntpd config here, not about GPS problems.
Edit:
I hope that you noticed that some of the config examples contain script leftovers: "emit" and quotes etc. stuff.