Shortcode for paid membership

I have a paid membership level and a free membership level. Is there a way to write a shortcode that can separate a certain group of paid members allowing them to have access to certain material.

I want to add a checkbox to an upload form we created using the Gravity Form plugin in order to identify a certain group that will be subscribing. I know I can just create another access level but was curious if there was a way to just use 2 levels.

hope that is clear.