/usr/include/vxl/contrib/gel/gmvl/ is in libvxl1-dev 1.17.0.dfsg2-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/vxl/contrib/gel/gmvl/gmvl_connection.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_connection_cache.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_connection_sptr.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_corner_node.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_database.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_helpers.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_image_node.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_node.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_node_cache.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_node_sptr.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_tag_node.h
/usr/include/vxl/contrib/gel/gmvl/gmvl_topology_node.h