I have the G1W-S with the GPS connected, and the latest firmware (the one with the file-protect function). I believe there is no way to remove the speed display from the video without disconnecting the GPS module. This is something that can negatively impact you following an accident, even one where you are not at fault. This would be a very basic feature to implement in firmware, but VIOFO has abandoned support for this camera. It was released in the beginning of 2017. Shameful.
If I'm wrong about this lack of function, let me know.
If I'm wrong about this lack of function, let me know.