I've migrated a website from .com to .org with all of the content for a client. This client has a large amount of images that were previously arranged in various galleries on different pages. Some of these galleries where simply just a row with 4 or 5 images fit together, and some galleries where a large amount of images put together in a mosaic style pattern. I am trying to replicate this now that they are no longer using wp.com but I have been unable to find a plugin with the same functionality as they used to have on .com.
Is there a standard way of replicating .com functionality? Or is the plugin that is available to wp.com available to use after a site is migrated?