Keyword searching from other website

I'm planning to annotate a great amount of pictures with keywords and descriptions. I was wondering if it is possible to call a keyword search from another website.

Let me explain: on a normal website (G2 is just visually embedded), all members are introduced. It would be nice to have a link "More pictures of John Smith" which leads you to G2 and all pictures containing the keywords and description "John Smith".

Any hint would be much appreciated. Many thanks