/usr/share/ is in gnustep-back-common 0.22.0-1ubuntu1.
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/usr/share/doc/
/usr/share/doc/gnustep-back-common/
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/usr/share/doc/gnustep-back-common/copyright
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/usr/share/GNUstep/Documentation/Developer/Back/ReleaseNotes/0.22.0/NEWS
/usr/share/GNUstep/Documentation/Developer/Back/ReleaseNotes/0.22.0/ANNOUNCE
/usr/share/GNUstep/Documentation/Developer/Back/ReleaseNotes/0.22.0/INSTALL
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/usr/share/doc/gnustep-back-common/Developer