Gus, a one-year-old black Labrador retriever, may be the nicest dog in town.
He’s trained to be.
The service dog was introduced to teachers and dozens of elementary students during an assembly Tuesday at Haines School, where he’s expected to become a daily fixture as a companion for Alex Moore, a first-grader with autism.
Service dogs are typically trained to guide people or perform specific tasks, but Gus’ job is to meet people and to…