I am sure the GX will find intself in the GCC, no way they will not sell it here, absolutely no reason.
I saw a launch news article about it in one of the leading english dailies in the UAE. They (the local reviwers and dealers) don't do that unless they want to bring the vehicle to the local market. See below, and the quote from the article.
One for the off-roaders: Lexus unveils new design of GX line:
"No details about a UAE release date have been announced yet."
GCC is bigger than the UAE, so I can not speak for the rest of the region.