I'm looking into ways of automatically loading Gedit as gksu gedit when I enter sudo gedit by mistake?

I have found that I have made a number of files unreachable by using gedit and I have only just found out why!

ACHIEVED SO FAR

I have written a script which will make an alias so that if I type in sudo <application> it can automatically convert that to gksu <application> but I want to make this alias stick, so that I don't have to run the script every time I boot the computer.

Is there a config file I can edit or should I run this script as a start up script (which would be inconvenient!)?