I need to Know how make a gui and have it where the characters face is showed of what they look like in the game?
Create a ImageLabel, with the following texture id (edit to your needs):
http://www.roblox.com/Thumbs/Avatar.ashx?x=100&y=100&Format=Png&username=**player name here**
Although it's kind of hard to explain how it works, this is how ROBLOX gets the image for your character, which means you can also use it in your games.