I installed 4 basic cameras and monitors in my GS. For about $60 you can get a 12v camera and monitor. I am adding a DVR to three of them for drive time recording. I have monitors mounted on the visor.
Monitor - Supports 2 cams
https://www.amazon.com/dp/B019U500V4...1-2bc3fc200bcc
Camera
https://www.amazon.com/Camecho-Vehic...ronics&sr=1-10
[IMG]ftp://
[email protected]/FI9816P_C4D6553DB5C4/IMG_0252.jpg[/IMG]