A Game Object that is more than one type can be affected by Game Effects that modify or interact with any of its types. Example: A unit that is also a gear can be affected by spells and abilities like the Ruination or Thermo Beam that say “Kill all units,” or “Kill all gear.” A unit that is also a gear can be targeted by spells and abilities like Vengeance or Rocket Barrage that say “Kill a unit,” or “Kill a gear.”
§ 178.3 Core Rules PDF (officieel)
§ 178 Game Objects can have multiple types.