What is the function of gills in the mot (mammal) species?

It seems there might be a misunderstanding in your question. You mentioned "gills mot," but the provided documents and context are related to finding MOT (Motor Vehicle Test) centers near you. Gills, in the context of mammals, typically refer to gills found in aquatic animals like fish and some amphibians, not mammals. If you meant something else by "gills," please clarify the question, and I'll do my best to assist with a comprehensive answer.