Gravity is a widely understood and controllable force in the universe of IRR. All ships have Gravity Generators, which keep orientation normal. This is controlable gravity, with distinct edges. A body will not be pulled into a mass of artificial gravity.
Furthermore Gravity Belts provide means of directly enhancing or reflecting gravity upon a person, by deflecting the gravitonic force. Belts are not adjustable, and are set for specific gravities. It is much harder to simulate stronger gravities then it is to simulate lighter gravities with a Gravity Belt. Heavy Worlders typically do not need the protection of heavier gravity belts, however.
Gravity Guns, or Repulsors are a common Non-Lethal Weapon used by the Star Guard for pacification and defense purposes. Much larger Repulsors are common Ship Weapons through out the Union.