<paste> emerge: all ebuilds that could satisfy "virtual/x11" (from ebuild / x11-libs/gtk+-1.2.10-r9 merge) have been masked. </paste> I couldn't emerge x11, and I have a working X installation. What's keeping it from installing?
edit your /var/cache/edb/virtuals and see if the line that starts with virtual/x11 has any packages which are masked *** This bug has been marked as a duplicate of 9050 ***