Thing is this is an RP setting, the IQ system is just AI enhancements and things that normally wouldn't be explainable in RP setting.
How does getting smarter allow you to walk on a cloud? How does it explain walking on water? Lava?
House Avoider? What houses? You control when they occur.
Super Mobile? What's the point when you can use your surroundings?
Map surveyor? What map?
As of right now Gummis are used to evolve Eevee into Sylveon and in the shop known as To-Goat shop to raise your energy. I'm sure they'll probably get more use later on, but to drag the IQ system from the actual games would make things that don't make sense occur and would probably limit the roleplaying ability if we enforced it.
For example, you can't smash your way through a cave wall using another pokemon, because you haven't eaten enough gummis. You can't dodge attacks because you don't have quick dodger. You HAVE to walk into lava because you don't have Lava evader, even if that Lava would probably kill your character instantly.