gmusic.yaml

input_select:
  music:
    name: Playlists
    options:
     - " "   # Should be empty
    icon: mdi:playlist-play
  media_player:
    name: Speakers
    options: # entity_ids of your media players
     - "every_speaker"
     - "first_floor_speakers"
     - "kitchen_home"
     - "chromcast_onkyo"
     - "basement_speaker"
    icon: mdi:speaker-wireless

switch:
 - platform: gmusic
   user: !secret gmusic_user
   password: !secret gpassword
   device_id: !secret gmusic_device_id # http://unofficial-google-music-api.readthedocs.io/en/latest/reference/mobileclient.html#gmusicapi.clients.Mobileclient.login
   media_player: media_player # entity id of the input select used for mediaplayer
   playlist: music # entity id of the input select used for playlist

# OPTIONAL
group:
  google_music:
    name: Google Music 
    entities:
    - input_select.music
    - input_select.media_player
    - switch.google_music

shell_command:
  install_gmusic: pip3 install gmusicapi

automation:
  - alias: homeassistant_start
    trigger:
      - platform: homeassistant
        event: start
    action:
      - service: shell_command.install_gmusic