I want to connect my SPI Display to the PI and Display a Windows GUI on it. I already wrote a driver for the unix environment but I want to switch to windows now

I know there is a guide to create a display driver for my application where I can write text and circles and so on... but is there a way to write a general driver for the whole window manager? So that I have the same output on my display as on the HDMI Port.
To be precise, I use this display: KD035FM-7 -> more info here: http://en.lcdlcd.com/product3/2012-08-30/8461.chtml
This is my circuit, which is basically SPI Control.
https://www.dropbox.com/s/afybp49rzzvtb ... t.png?dl=0
Thank you!