I have one of these. It's gray, the GPIO is used for LCD backlight control and battery monitoring, some of the GPIO is exposed on the logic board for other uses

I have one of these. It's gray, the GPIO is used for LCD backlight control and battery monitoring, some of the GPIO is exposed on the logic board for other uses, the display connects via the HDMI port, the keyboard and mouse via USB, the GPIO scripts are written in python and moveable to your own OS install, the keyboard is mushy mushy mushy, but I like the trackpad, and I don't use the provided pi-top OS as I encountered a number of issues even logging in on the release version. It's a decent piece of hobby hardware and I should be able to swap in something like a Odroid-C1+ in the future.