GMap Activation Error
This is a classic GMap problem. It usually occurs when the map doesn't know it's dimensions initially. For example: when the dimensions are set in a stylesheet (.gmap {width: x; height: y;}). 

You could try setting them inline on the wrapper div (&lt;div class="gmap" style="width: x; height: y;"&gt;) or trigger a resize after the page has loaded, as explained here: How do I resize a Google Map with JavaScript after it has loaded?

If you are using the gmap or geolocation module, you can set the dimensions in the widget properties.