Good luck with the project. Are you adding the GPS component as a hobby challenge? If it's going to be an NTP server, then it could also be an NTP client.
Its more of a hobby project. Have a spare Rpi 3b and Usb GPS dongle from another project. Plus, saw some cool projects on the nixie sub. Figured, it would make a nice looking retro clock in my home office. The USB dongle is a big finicky. So if I can't get that to work - then I might just make it into a NTP client and let it sync up with a public server. Nothing on my LAN or homelab is mission critical where I need that level of time accuracy.
