At the current time, there is no way to plug a GPS unit into the USB port of the Z1 and have it work without manual security authorization every time you plug it in. (It’s not usable except for testing). There’s a long proof of concept here:
Plug-in Adds GPS Direct to RICOH THETA
As the Z1 does not have a GPS chip, you would need to pull the GPS coordinates from a mobile phone or other device. To do this, you likely need to connect the Z1 with bluetooth, which is possible, but not easy.
There aren’t easy examples for bluetooth exchange with the Z1 and a mobile app. However, the API is open and does appear to work.
Once you have the GPS coordinates into the camera with Bluetooth, the plug-in is a normal Android app running without a screen, so that part should be feasible with examples from Google, assuming that we can find examples with a normal android phone video file.
- time to build transfer mechanism with bluetooth: unknown. Might take a long time
- time to find Android example with normal phone: 4 hours
- time to implement based on Android example (if it exists): 20 hours
- testing and revision: 10 hours
The unknown part here is the bluetooth connection.
Also, we would need to find a good example on Android phones to use as a base. I’m not sure the example exists.