to configure it. then
to run it. you'll need a front end, like giFTcurs. gl
edit: or i guess Apollon is the front end? sorry, i don't use that so i didn't know. but i would guess after configuring gift-setup you can run apollon by launching it from the command line. if it's not in your path, update your database (as root) with:
# locate apollon
if it doesn't find it, try Apollon (case sensitive), or see if the binary has another name and try to locate that. gl.