Might be good to add to this list that gyms should have room for 4-10 Trainers including the gym leader- a lot of the submissions I've seen are really good looking single rooms with space for a single fight with the gym leader and maybe a lackey on the way in the door- they look great and obviously ...

This gym has been added according to the wiki: http://pixelmonmod.com/wiki/index.php?title=Fire_Gym

This gym has been added according to the wiki: http://pixelmonmod.com/wiki/index.php?title=Fire_Gym

This gym has been added according to the wiki: http://pixelmonmod.com/wiki/index.php?title=Ground_Gym

More insights from a guy who knows what's what:

Pixelmon Config.
Enable external files.
Create your things in the new "pixelmon/structures/gyms" file
then NPC's go into pixelmon/npcs/gyms

Hope that helps!

Hey Kingblaze! My experience with implementing gyms is limited (yet! that doesn't make sense...) but I assume you've found this in the wiki: http://pixelmonmod.com/wiki/index.php?title=Block_snapshots#Block_snapshots I can try to poke around when I get home tonight to figure out a better answer but ...

Hey GoofShoes, I'm helping with Pixelmon in a volunteer capacity to implement gyms into the mod. I think this gym is very focused on being functional with a maze and room for trainers (and a lot of submissions fail to have a challenge of puzzle) but this one loses it's aesthetic with a freestanding ...

Hey PrimalUrsus, I'm helping with Pixelmon in a volunteer capacity to implement gyms into the mod.In reviewing these gyms I really like the aesthetic - but one of the conventions I've learned working with the people making the mod is the expectation for gyms is to have some kind of puzzle/obstacle t...

Hey TacticalDecoy, I'm helping with Pixelmon in a volunteer capacity to implement gyms into the mod. Reviewing this gym I'm not sure why it wasn't included. If you'd like I can try to see if it can be reviewed for consideration and if not find out what about it kept it from being chosen so modificat...

Hey Shykiyrm, I'm helping with Pixelmon in a volunteer capacity to implement gyms into the mod. I like the idea behind this gym a lot but I've seen a lot of submissions assume a bit about the terrain they will be surrounded by and makes for some designs that WOULD work great if they always spawned i...