/usr/lib/x86_64-linux-gnu/libgeis.so is in libgeis-dev 2.2.17-1.1+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgeis.so.1.3.0
/usr/lib/x86_64-linux-gnu/libgeis.so.1.3.0