Skybrud.Umbraco.GridData is a small package with a strongly typed model for the grid in Umbraco.
The package makes it easy to use the model in your MVC views, master pages or even in your custom logic - eg. to index the grid data in Examine for better searches.
The package is available on NuGet as well. This is the recommended approach to installing the package.
You can find a bit of documentation for this package on GitHub.