[Vuejs]-Missing movies attribute on result Vue GraphQL

Per this issue, your apollo property should have a matching data property, but in this case they are mismatched (one is named movies and getMovies). Change one or the other:

export default {
  name: 'HelloWorld',
  data(){
    return {
      movies: []
    }
  },
  apollo: {
    movies: {
      query: gql`
        query StarWars {
          movies(query: "Star Wars") {
            title
            overview
            poster_path
            id
          }
        }      
      `
    }
  },
  props: {
    msg: String
  }
}

Setting the data yourself inside result isn’t necessary.