/usr/lib/x86_64-linux-gnu/libgcugtk-0.14.so.0 is in libgcu0v5 0.14.17-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgcugtk-0.14.so.0.14.17
/usr/lib/x86_64-linux-gnu/libgcugtk-0.14.so.0.14.17