As a beginner with this new hardware I am trying to figure out what graphic chips are supported by the Rhino. looking at the sdk all I see is specifing height & width not chip type or interface serial or parralel or SPI.
Welcome!
The Rhino is just another form factor for the USBizi chip, so it supports several communication protocols, to include UART and SPI. There is no specific list of hardware, however. Any of the existing code will work on a Panda/Panda II/Domino/Rhino (some with minor changes). IF you’re lucky, someone may have written a driver for a specific display component (see code.tinyclr.com), otherwise you can always write one 
In theory, you could also write a parallel driver, but that is something I’ll leave for others to comment on…