Recently I finished an article for IBM on using Grails and Flex together. In the article I created a Digg-clone and used things like Flex DataGrid and Forms to browse and submit stories. I decided to see how well the new Flex Builder tools could create the same code for me. So I took the existing service and imported into Flex Builder
The screenshots give you an idea of the process. As you can see from the final screenshot, there is a lot of code generated! A service proxy and return types are both generated. Actually for each there is a base class with all of the guts and empty class built for you to customize. There is a modeling class that contains metadata about the return type. The base service class uses a new Flex class HTTPMultiService. It is a lot of code, a lot more than I wrote. Most of it seems reasonable though.
You can also generate a data grid for displaying the data. This worked perfectly for me. Gumbo also promises that in the future you will be able to generate other components, in particular a Form.