I think the definition of gastropub is essential to this question.
It's obviously not clearly defined, but I'd say any restaurant that serves great "pub" food and also serves great beer qualifies. However, I think in addition to being good, the food at a gastropub has to aspire to be something more than just pub food. So in my book Kuma's, the Gage, Hop Leaf, Paramount Room, and Cooper's all qualify.
Some examples of restaurants that I wouldn't call gastropubs
Publican - since it does not serve pub food in the traditional sense, I'd say it falls under the restaurant with good beer selection heading
Sheffield's - I'd say this is a bar that happens to have good food, but not a gastropub because the food is not an integral part of the experience there
I think Goose Island is an interesting example. While it is clearly a brew pub, I think that the food is interesting enough and important enough to make it a gastropub as well.