/usr/lib/libgwengui-cpp.so.0 is in libgwengui-cpp0 4.12.0beta-3+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libgwengui-cpp.so.0.0.0
/usr/lib/libgwengui-cpp.so.0.0.0