Hi,

You may have more success getting an answer to your question if you post it in the [url=http://forums.b2evolution.net/viewforum.php?f=9]Plugins & Extensions[/url] and particularly if you reply to a topic that is about the Galery 2 plugin. That way you might even attract the attention of the developer.

Good luck

I'm not an expert with regards to Gallery 2 but it would have to be a random query once you know how to get pictures out of the backend. Depending on how slow that query is you may want to cache the pics in between.