app-misc/cdircmp-0.8 was released on 2007-02-10 and renamed to app-misc/gdircmp.
It's not renamed, cdircmp is ncurses, while gdircmp is GTK-2. So this should be considered a new package
I think it is safe to assume that the upstream of this project is now dead, as there hasn't been a new release since February 2007. Moreover, I'm quite sure one can achieve the same with dev-util/meld. Is there still any user demand for including gdircmp into Portage?