I’m a writer based outside of the U.S, is it possible for me to still register with the Writers Guild of America? And how exactly do I do that, what fees are involved? I need all the 411. thank you.

Here’s a quick start for you:

http://www.wga.org/subpage_whoweare.aspx?id=84

You can contact the Guild directly with further questions via the contact link on their website.  Any joining of the Guild, of course, will have to wait until the strike is over.