No clonezilla has no GUI.
I am in touch with the team : they plane to make a special livecd including clonezilla and gparted. this could be nice ; not sure it is possible (technical problems).
About GParted code i am not able to give you anything since i don't understand one word of C++ :-/
But i can give you Plors address so you can contact him. He is *the* GParted dev ( i am only livecd maintainer). : gparted@users.sourceforge.net
Tell him about your post in the forum and our contact.
We need guys like you if you have some time ... There is many things to improve, and Plors have no time left ATM.
The next work is to see how to make Vista resize working well ! sometimes it works sometimes it doesn't, and ATM we don't know why.
I should have a vista in a couple of days so i can make tests, but i can only report what i find ; not able to fix anything...
Larry
GParted-project Admin
Former GParted-LiveCD maintainer (2007)