good to hear that it works now
with the gtk USE flags set
since you want to install gnome it is probably a good idea to add this USE-Flag globally and not just this time.
Please don't take the following the wrong way!
I'm not lazy and willing to help - and so are all the others,
but perhaps you should read through the excellent documentation
- these things will be more clear then
here is a link to the Gentoo 2005.1 Handbook (the section about USE-Flags):
in the main menu of this site are all sorts of links to FAQ's wikis and tutorials.
One would just be both redundant and very busy answering questions all the time all over again.
the command BTW:
USE="gtk" emerge -a app-text/poppler-bingings
but this is temporary as I said, and will put you in the same position on your next upgrade...