I am developing a photography site and I want to integrate an external gallery onto a subdomain. Basically the user would land on mysite.com, where he could access all the other resources, but if he clicks "gallery" he is sent to the subdomain gallery.mysite.com which would be a domain map of a gallery hosted on a different site (an external provider that specialises in this sort of thing).

The reason for this is because I want to outsource the purchasing, printing, and photo search functions, and focus on the other resources.

My question is, would this be bad for SEO in any way? Is there anything here that would make google suspicious of my site or regard the galleries themselves as duplicate content? The galleries themselves would consist solely of pictures, the only text would be the file names and subgallery folders.

Thank you for any input