Hi Steve, gfontview has some reasonably-easy-to-fix bugs that prevent it from entering the "testing" distribution. I'd NMU it, but I don't want to "prolong the agony", so to speak -- the package should be orphaned and removed if you can't maintain it in a remotely timely manner.
And besides, I like gtkfontsel better, it's not limited to specific search paths and I don't need any advanced features gfontview (has|may have). Now, the upstream development version of gfontview sounds like something that would be worth looking at, but again, that needs an active maintainer. -- 2. That which causes joy or happiness.