/usr/share/man/man3/gd_framenum.3.gz is in libgetdata-dev 0.7.3-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/gd_framenum_subset.3.gz
/usr/share/man/man3/gd_framenum_subset.3.gz