/usr/lib/x86_64-linux-gnu/libgif.so is in libgif-dev 5.1.4-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgif.so.7.0.0
/usr/lib/x86_64-linux-gnu/libgif.so.7.0.0