Where to find ARM GCC compiler in XCODE5?
Apple stopped shipping gcc with Xcode.

The clang compiler presents itself as gcc (technically I believe it's an llvm front end that respects many gcc flags) when you install Xcode from the Mac App Store:

Mac:~ me$ xcrun --find gcc
/Applications/Xcode.app/Contents/Developer/usr/bin/gcc
Mac:~ me$ `xcrun --find gcc` --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 5.0 (clang-500.2.76) (based on LLVM 3.3svn)
Target: x86_64-apple-darwin12.5.0
Thread model: posix


If you need a different compiler, you'll likely need to download it elsewhere or build it from source.