As http://gmic.sourceforge.net/gimp.shtml says: This plug-in is the logical sequel of our previous GREYCstoration software, dedicated to image denoising and regularization. Actually, G'MIC provides all the GREYCstoration features (through the filter entries Enhancement/Anisotropic smoothing and Patch-based smoothing), but also much more. As the development of the GREYCstoration software has been discontinued, we highly encourage former users to switch to G'MIC. Reproducible: Always This involves media-gfx/greycstoration and media-plugins/gimp-greycstoration.
media-gfx/gmic and media-plugins/gimp-gmic have been added to the tree.