/usr/lib/x86_64-linux-gnu/libgsound.so is in libgsound-dev 1.0.2-1+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgsound.so.0.0.2
/usr/lib/x86_64-linux-gnu/libgsound.so.0.0.2