Это ты какую версию Google Charts используешь?
Если вторую, то тебе надо сформировать фактически таблицу с данными типа такого:
{
"containerId":"chart",
"dataTable":{
"cols":[{"label":"A","type":"string"},{"label":"B","type":"number"}],
"rows":[{"c":[{"v":"Online"},{"v":100}]}]
},
...
}
Можешь поиграться тут - это всё ссылка на твой пример:
http://charts.hohli.com/new/embed.html?created=1459573342411#w=640&h=480&d={"containerId":"chart","dataTable":{"cols":[{"label":"A","type":"string"},{"label":"B","type":"number"}],"rows":[{"c":[{"v":"Online"},{"v":100}]}]},"options":{"hAxis":{"useFormatFromData":true,"viewWindow":{"max":null,"min":null},"minValue":null,"maxValue":null},"vAxes":[{"useFormatFromData":true,"viewWindow":{"max":null,"min":null},"minValue":null,"maxValue":null},{"useFormatFromData":true,"viewWindow":{"max":null,"min":null},"minValue":null,"maxValue":null}],"booleanRole":"certainty","width":600,"height":371,"min":0,"max":1000,"greenFrom":200,"greenTo":400,"yellowFrom":400,"yellowTo":800,"redFrom":800,"redTo":1000},"state":{},"view":{},"isDefaultVisualization":false,"chartType":"Gauge"}
