Hi,
Well, there is always a way in programing. However, it's not easy to do.
First, the options data, the prices of the options, the discounts on the prices of the options, etc are not loaded in the plugin's code.
Then, the question is how to choose between the different prices of the different options as there is no mechanism in Google Products to add options to products and a product has to have a price in the feed.
So it would require quite a bit of development ( 200 or 300€ of development cost). I think the best would be to add an extra event to the google products plugin so that other plugins could override the data of the products between the loading of the data and the generation of the XML. That way, a custom plugin could, for free products, load the options of the products and then their prices (and discounts, etc) and then set the price of the these products based on that data.