It depends on the product.
A number of the Google Maps applications are used to imbed calls to the Google Map Server in your application. Therefore, calls for maps would have calls to Google. I believe that it is possible to have your own map server, but that would be an incredible amount of work.
A number of the other services for Google+, Google Ads, etc. also are for making use of Google services and make a number of calls to Google for that reason.
Google Web Toolkit builds a web application and doesn't make calls to Google.
I haven't worked with the HTML5 editor, but I would be surprised if it made to calls to Google servers unless it was required for a specific function. My only worry would be that it might be too directed towards Chrome rather than Firefox, Opera, Safari, etc.
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