Thanks, found them. Now when I attempt to unpack a tar.bz2 archive with tar, it says it needs lbzip2 (tar doesn't need it for gz and xz archives, though). Where can I find lbzip2?
Edit: The error message is somewhat misleading. What tar needs is the bzip2 executable in the GG:bin/ path (which is not created when the SDK is not installed). After creating the respective assignment, it works well.