jsFiddle

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• JavaScript
• HTML

jQuery(function($) {
    var map = new google.maps.Map(document.getElementById("map_canvas"), {
        center: new google.maps.LatLng(36.180774, -86.735863),
        zoom: 11,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    });
    var infowindow = new google.maps.InfoWindow();

    $.get("http://locator.aids.gov/data?zip=37206", function(data) {
        $('p').remove();
        $('body').append('<h2>' + data.title + '</h2>');
        $.each(data.services, function() {
            $('body').append('<h2>' + this.title + '</h2>');
            $.each(this.providers, function() {
                var entry = [
                    '<p>',
                    '<strong>' + this.title + '</strong><br/>',
                    this.streetAddress + '<br/>',
                    this.locality + ', ',
                    this.region + ' ',
                    this.postalCode,
                    '</p>'];
                var marker = new google.maps.Marker({
                    position: new google.maps.LatLng(this.point.lat, this.point.long),
                    map: map,
                    title: this.title,
                    animation: google.maps.Animation.DROP
                });
                google.maps.event.addListener(marker, 'click', function() {
                    infowindow.setContent(entry.join(""));
                    infowindow.open(map, marker);
                });
            });
        });
    }, 'jsonp');
});

<p>Loading...</p>
<div id="map_canvas" style="width:100%; height:100%"/>