/usr/lib/x86_64-linux-gnu/libgtkd-3.so.0 is in libgtkd-3-0 3.7.5-2build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgtkd-3.so.0.7.5
/usr/lib/x86_64-linux-gnu/libgtkd-3.so.0.7.5