I apologize, I am used to the terminology of Frostbite.
GI is also stored in the probe data through the “volumetric lightmap samples”. What I mean is that the object should use the data stored there, like dynamic (movable) objects do, not that the lights should be dynamic. If their surface area is small and they do not really contribute much to the light interactions in the scene they don’t really need baked lightmaps.