I hope to do more later, but I did add a nice draw function to all the gui, that allows you to use pygame.draw.rect for borders, and such.

I plan to get the gui.Window and gui.Menu done today, and the gui.Scrollers done tomorrow.

I managed to get the gui.Window class acceptably finished last night.
It took a lot longer than I had hoped, and it's render time is rather slow , but on the whole it performs well and looks nice. I might try and speed it up, if I can finish the other gui quickly enough.