/usr/lib/x86_64-linux-gnu/libgwymodule2.so is in libgwyddion20-dev 2.50-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgwymodule2.so.0.11.0
/usr/lib/x86_64-linux-gnu/libgwymodule2.so.0.11.0