With a simple app foundation in place,
convert the model to use the db.Model supplied by Google App Engine, and the various db.Properties.
after converting the model to the best of your ability, add it in to a new google app engine application. Don't worry about a framework at this stage. Can always migrate to that later as the need dictates.
(this assumes you've created an account on google app engine, and have downloaded the SDK somewhere locally... see below for notes on these steps)