i think it doesn't do much on gpu (well maybe some basic blits) unless you go for the opengl then offcourse you are doing it on the gpu.
But you must make a pretty big game would you need the gpu to draw for you
(or program real inefficent)
as most people here aren't master programmers I doubt that we would need much hardware accelerated graphics.
it should be an easy and nice game as far as I know.
maybe some 50.000 lines ? maybe 100.000 dunno. not that much.