For some of GCC's ugliness, more of the improvement may come from the "rewrite" part than the "in C++" part. The "in C++" part just encourages a more thorough refactoring and rethinking of the problem, than a superficial tweaking-for-less-ugly.
In any case, nothing will fix GNU's ugly indenting standards as long as the language has a C/C++ style syntax. ;-)
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