This relationship, however, exists purely on paper. Actual governance is performed by the GNOME Foundation, whose membership consists of all contributors to the project, and most (but not all) funding comes from Red Hat.
Edit: Beaten to the punch. That's what I get when I try to post and code at the same time.
GNOME project, and its products, are the work of the GNOME Foundation [0], not GNU/FSF.
GNU links to GNOME from the name "gnome" within its list of "GNU packages" [1], but GNOME is, and has been for some time, its own separate organization. GNU claims that things it lists as "GNU software" consist of software "released under the auspices of the GNU Project" [2], but that doesn't seem to apply to GNOME in any meaningful sense now, though historically GNOME was a product of the GNU project.
EDITED: to reflect historical relationship noted in cwyers reply.
> The Free Software Foundation (FSF) announced the release of GNOME (GNU Network Object Model Environment) 1.0 today at the Linux World Conference. GNOME is an integrated desktop environment designed to run on GNU/Linux systems.
> The Free Software Foundation, a tax-exempt charity formed in 1985, is dedicated to eliminating restrictions of people's right to use, copy, modify, and redistribute computer programs. It does so by protecting these rights through the GNU General Public License. The aim is to give people the freedom to cooperate with other computer users.
> "GNOME is a flexible GUI (Graphical User's Interface) that combines ease of use and the flexibility and reliability of GNU/Linux. We're very excited about GNOME and what it will mean for the future of GNU/Linux computing" Miguel de Icaza, chief designer of GNOME said earlier.
At one point, the G in GNOME stood for GNU (now GNOME is just a name, not an acronym), and the FSF was active in its maintenance.
My assumption is that the FSF used to be responsible for GNOME's governance before the GNOME Foundation existed, and nobody ever bothered to update the website afterwards.
That it's still listed is either stale, inaccurate data on a webpage or a relationship that only exists on paper, depending on how you look at it.
Oh, and all this just underscores my point that GNU has effectively no presence in the graphical sphere except for a few scattered applications (e.g. GIMP, Emacs).
I am pretty sure GNOME is separate from GNU/FSF.