Actually a lot of “high-level” user-end utilities are indeed not GNU… now even more so as Gnome is not anymore (and doesn’t want to be associated to) GNU.
An unfortunate thing is that GNU project lacks indeed any full-featured server. There are some minimal servers in inetutils and mailutils, there are stuff like MyServer… But not much really that good or known in the end. Furthermore, most of really high-level GNU software are something quite essential but “hidden” in computing: languages implementation (essentially lisp, but also ed, sed, awk, bison, make, smalltalk, gs, prolog, mhtml, forth, gnash, eiffel, etc.), and package managers (stow, swbis, source-install, gsrc, guix, etc.) which most non-developer users won’t know about (and developers won’t necessarily think about it’s GNU).