You'd still need the phone to have a data connection for GadgetBridge to download the AGPS data (unless someone worked out how to do what I mentioned above).
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
You'd still need the phone to have a data connection for GadgetBridge to download the AGPS data (unless someone worked out how to do what I mentioned above).