Hey Bandit,
We talked it over, and while it seems we didn't have a good grasp of what you were asking, in the end it's not a big deal. The project you are working on seems to be within the spirit of Garry's Mod, and doesn't detract from ours unless it is used differently in the future to directly compete with us. As long as your project stays with its current intent and proper credit continues to be given to GES, we have no problem with you using the GES assets in their current form.
We would ask that when our next version is released (Beta 3), and your project would like to use assets from that, that you contact us again to make sure that the content creators are ok with the use of their assets.
Thanks, and sorry for the confusion.