When i tried to use G-sensor i had to enter custom values for it to my Lukas dashcam as even its most unsensitive setting was triggering all the time, even my driving triggered it.
In the end i said WTF i record all the time anyway so i disabled G-sensor, and i am sure of there is a event i will be able to tell when.
But i would like in the future to use G-sensor for parking mode as i feel there motion detect is making too many false recordings, but i could make do with a strong gust of wind or a semi or bus passing close by would trigger the G-sensor and make a false recording.
I would also like audio trigger for parking mode in future cameras, like the glass break feature there is in some car alarms.