/usr/include/GNUstep/Frameworks/BioCocoa.framework/Headers is in libbiococoa-dev 2.2.2-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/include/GNUstep/Frameworks/BioCocoa.framework/Versions/2
/usr/include/GNUstep/Frameworks/BioCocoa.framework/Versions/2