I am trying to make a buddypress review site similar

I am trying to make a buddypress review site similar to IMDB but I want the post to auto load the taxonomies based on the title the user is making the review for(The Title would chosen from a custom field dropdown).

FYI I'm using Gravity Forms for this so I can have front end user posting. Any plugins/links/code or just a point in the right direction would be greatly appreciated!

Thanks