@bigbird1227 - you should be able to do this already with this plugin. Just choose your rating column on the first configuration page, then setup your sync action for each shelf you want to import from by ticking the checkbox to sync the rating from goodreads in your sync settings for that shelf.
Though that is your own rating for the book on goodreads. If you want the goodreads rating, then you need to use the Goodreads metadata plugin. However it is not possible to import into a custom column from a metadata plugin, so you would need to switch around your usage of rating columns.