My Fenix 5 is on the 10.55 beta. I checked to see, if it would update to GPS 2.30, because there are a number of reports on the Fenix 5/5S plus forum topic that mention Fenix 5 (not plus) watches also getting updated. Mine did.
This morning the watch did an automatic update to the 2.30 update, but I have Beta 10.51 installed, not the latest 10.55 (just hadn't got around to it).
I believe if you are on the beta fw all you need to do is connect your watch to garmin express and it will auto check for and push this update. If you are on the Garmin release FW v10.0 you wont get it due to GPS version 4.40 being installed with that fw. I might be mistaken but that is my understanding.