I am trying to get a Visual Studio's gridview like control for Monotouch development. I had a look at AQGridView. Does AQGridView works with Monotouch? Is there a library for AQGridView which I can add to my monotouch project?
You should be able to use about any Objective-C library with MonoTouch.
You will just have to setup a MonoTouch binding project in order to use it.
Here is a link to another answer of mine that goes over it: OpenFeint with MonoTouch
Also read the Xamarin docs: http://docs.xamarin.com/ios/advanced_topics/binding_objective-c_types
Another UI library to look at is Three20. It's used in a lot of apps, like Facebook and Dropbox, etc.