Well...I'm no expert with coding anything in Geeklog, but I would assume you'd need some sort of RDF feed or something for that. Because you can set GL blocks to display RDF feed info.
MrP
Another option would be if you find a site that publishes a Webservices API for their movie listings, I could give it a go ... similar to what I have done for other Geeklog Webservices such as Amazon and Google in particular...
--John