Creating an image archive searchable by keywords (7.1)

Hello, I am building a site that would like to have numerous images in an archive searchable by meta keywords.  When I attempted to test build it, I found my only option for a search function the was the "news" page, rather than the archive page I had created.  That archive page had a gallery (only one image uploaded with allowing keywords activated) for testing, but none of that showed up in my options either.

In another question, I don't see the gallery listed under the "not linked" section either.  Don't know if only having one image in it is the cause.  

Appreciate any help with this, thanks.