The appearance of the GPS and non-GPS mount is the same, so they can not be differentiate visually.
If you have both mounts in hand, you can differentiate by weight, the non-GPS mount is a little lighter than the GPS mount.
Besides, you can differentiate them when recording: choose "on" for the setting of "GPS", if it is GPS mount, there will be speed shown in the video, if it is non-GPS mount, it shows "No GPS".