Night Mode - GoPro Silver
There is no way to set Night Mode in GoPro Silver
If you're looking for the best quality night pictures and time lapse, your best bet is to get the GoPro 7 Black. The Silver version has very minimal functionality to low light photography.
GoPro 7 Silver Specs
A quick look on how the iPhone XS Max is a better camera for night photos. (Tip: You have a lot more control over the settings than you do with the GoPro 7 Silver series.)
|iPhone Xs Max
Note: GoPro Silver users have no control over the Shutter Speed and Exposure time.
Sample YouTube Video
GoPro 7 Silver YouTube video showing the morning sunrise in time lapse.