func newHandler(w http.ResponseWriter, r *http.Request) {

  fmt.Println("GET params:", r.URL.Query());      
  // if only one
  moviename := r.URL.Query().Get("moviename")
  if moviename != nil {
    ... process it
  }
  // if multiples possible
  movienames := r.URL.Query()["moviename"];
  if movienames != nil {
    ... process them ...
  }    
}