/usr/share/man/man1/rgvim.1.gz is in vim-gui-common 2:7.4.488-7+deb8u3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/gvim.1.gz
/usr/share/man/man1/gvim.1.gz