The latest minor update of gcc, the gcc 4.8.1 was released a few days before. This release makes gcc the first compiler to implement all major features of C++11 specification.
See the C++11 support in gcc page for more information.
Incidentally, Clang/LLVM is also busy working towards a full implementation of C++11 in the next revision 3.3, which is due to release in this summer. See the C++11 support in Clang page.
It’s also worth mentioning the C++ standard committee is gearing towards the next C++ standard: the C++14 (or C++1y) and C++17. Both GCC and Clang/LLVM have limited experimental support of C++1y.