geckoboard.map.json

{ 
  "points": {
    "point": [
      {
        "latitude": "{{ latitude }}",
        "longitude": "{{ longitude }}"
      }
    ]
  }
}

geckoboard.number.json

{ 
  "item" : [ 
    { 
      "text" : "The current value",
      "value" : 123
    },
    { 
      "text" : "The previous value",
      "value" : 238
    }
  ]
}