/usr/include/libexif-gtk/ is in libexif-gtk-dev 0.3.5-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libexif-gtk/gtk-exif-browser.h
/usr/include/libexif-gtk/gtk-exif-content-list.h
/usr/include/libexif-gtk/gtk-exif-entry-ascii.h
/usr/include/libexif-gtk/gtk-exif-entry-copyright.h
/usr/include/libexif-gtk/gtk-exif-entry-date.h
/usr/include/libexif-gtk/gtk-exif-entry-flash.h
/usr/include/libexif-gtk/gtk-exif-entry-generic.h
/usr/include/libexif-gtk/gtk-exif-entry-number.h
/usr/include/libexif-gtk/gtk-exif-entry-option.h
/usr/include/libexif-gtk/gtk-exif-entry-rational.h
/usr/include/libexif-gtk/gtk-exif-entry-resolution.h
/usr/include/libexif-gtk/gtk-exif-entry-user-comment.h
/usr/include/libexif-gtk/gtk-exif-entry-version.h
/usr/include/libexif-gtk/gtk-exif-entry.h