The particular tent I used isn't global. I had to add an entry in felwithea_assets.txt to pull in the models from live_event_objects.eqg.
To know what models are available globally, make a list of the files referenced in your EQClient\Resources\GlobalLoad.txt file.
Then check those files in the Model Inventory I linked to earlier, and any model names in that file's entry will be available globally.
http://www.jondjackson.net/eq/emu/fi...lInventory.zip
You can search the above inventory file for non-global objects available in your particular zone by searching for ZoneNick_obj.s3d or ZoneNick.eqg. The available model names will all be listed there. For guka, for example, I see a model called GUKDOOR700 that looks promising, as well as GUKMETGATE700 and GUKMETGATE701.
I have not found any global door objects via a quick skim of the global model files. However, you can easily add objects from other zones using the ZoneNick_assets.txt feature. Note that this is a client change that has to be done on each client that's going to be playing on your server.