A full sample GP response for a simple listing screen.

sample_gp_response.json

{
  "screens": [
    {
      "id": "ROOT",
      "screenProperties": {},
      "layout": {
        "wide": {},
        "compact": {
          "type": "SingleColumnLayout",
          "main": {
            "type": "MultipleSectionsPlacement",
            "sectionDetails": [
              {
                "sectionId": "hero_section"
              },
              {
                "sectionId": "title_section"
              }
            ]
          },
          "nav": {
            "type": "SingleSectionPlacement",
            "sectionDetail": {
              "sectionId": "toolbar_section"
            }
          },
          "footer": {
            "type": "SingleSectionPlacement",
            "sectionDetail": {
              "sectionId": "book_bar_footer"
            }
          }
        }
      }
    },
  ],
  "sections": [
    {
      "id": "toolbar_section",
      "sectionComponentType": "TOOLBAR",
      "section": {
        "type": "ToolbarSection",
        "nav_button": {
          "onClickAction": {
            "type": "NavigateBack",
            "screenId": "previous_screen_id"
          }
        }
      }
    },
    {
      "id": "hero_section",
      "sectionComponentType": "HERO",
      "section": { 
        "type": "HeroSection",
        "images": [
          "api.airbnb.com/...",
        ],
      }
    },
    {
      "id": "title_section",
      "sectionComponentType": "TITLE",
      "section": { 
        "type": "TitleSection",
        "title": "Seamist Beach Cottage, Private Beach & Ocean Views",
        "titleStyle": {}
      }
    },
    {
      "id": "book_bar_footer",
      "sectionComponentType": "BOOK_BAR_FOOTER",
      "section": {
        "type": "ButtonSection", 
        "title": "$450/night",
        "button": {
          "text": "Check Availability",
          "onClickAction": {
            "type": "NavigateToScreen",
            "screenId": "next_screen_id"
          }
        },
      }
    },
  ]
}

Cool stuff, still helpful and counting !!