One of the things I hate about Gmod "model packs" is that a majority of the content within them is stolen from other games, mods, other model packs, etc. If someone wants to put all the GES stuff in gmod, they can copy it all over from the mod folders themselves in a whole 15 seconds. Unless one of the leads comes by and says yes it's fine, I would say no as a lot of the developers probably don't want their wonderfully crafted models stuffed into a zip and uploaded on the Gmod site.
Additionally, the contents of the zip will be outdated/obsolete as soon as the next version comes out with additional/updated content.