I think, if I understood you correctly, that the problem is really just that whatever icon theme you are using in GNOME, is missing the appropriate mimetype icon for encrypted content, which got really nothing to do with kgpg or KDE at all.
I think, if I understood you correctly, that the problem is really just that whatever icon theme you are using in GNOME, is missing the appropriate mimetype icon for encrypted content, which got really nothing to do with kgpg or KDE at all.