/usr/lib/x86_64-linux-gnu/libSDL2_gfx-1.0.so.0 is in libsdl2-gfx-1.0-0 1.0.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libSDL2_gfx-1.0.so.0.0.0
/usr/lib/x86_64-linux-gnu/libSDL2_gfx-1.0.so.0.0.0