An example of a Google Chart in an app using RequireJS and BackboneJS

gchart.js

var listData = ["LABEL C", "LABEL D", "LABEL E"];
listData = listData.concat(
    _.map(this.model.toJSON(), function (item) {
        return [item.PropertyName, parseFloat(item.PropertyC), parseFloat(item.PropertyD), parseFloat(item.PropertyE)];
    }, this)
);
data = google.visualization.arrayToDataTable(listData);

// Create and draw the visualization.
var ac = new google.visualization.ComboChart($container[0]);
ac.draw(data, {
    seriesType: "bars",
    isStacked: true,
    chartArea: { left: "5%", width: "80%" },
    colors: ["red", "blue", "green"],
    fontSize: 12,
    series: { 1: { type: "line" }, 2: { type: "line"} }
});

To load google api I use the next line in the define of the view
'goog!visualization,1,packages:[corechart]',
goog is defined in paths of requireJs definition with propertyParser and async from https://github.com/millermedeiros/requirejs-plugins