/usr/share/man/man1/x86_64-linux-gnux32-gnatfind.1.gz is in gnat-8-x86-64-linux-gnux32 8-20180414-1ubuntu2cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/x86_64-linux-gnux32-gnat-8.1.gz