I'm not aware of any GUI, but if you compiled CGMiner from source, you should be able to figure out the command line without much of a problem.
To use the command line you just do
command option1 option2 option3 ...
You have to follow the options that are specific to the command. You can pretty often get a list of the options with the option --help. E.g.
cgminer --help
(side note, I don't know why, but on my system, this takes over a minute, but it does eventually come back. I think it's because I'm running cgminer at the same time, though).
Now watch this video for some more tips:
http://www.youtube.com/watch?v=v1TKYpxTmso