There is no official GUI. There are two unofficial GUIs.
oh thanks for the rapid answer! but I dont know how to use this if it has no graphics. why no official real wallet? like that who can use it? Cause I dont trust third party apps.
An official GUI is being developed but is a while off. The technology became available (from the cryptonote reference code) without a GUI. The third party apps are open source and were sponsored in large part by members of the core team. So while caution is always advised I don't see a major problem with trusting them (other than that new software can always have bugs -- backup often).