I need to show a name of Wordpress Gallery in a page. I wrote a plugin, which copies gallery shortcode from the page, if found, copies it to metas, where you can enter a param. It looks like [gallery columns="9" link="file" ids="85,84,83,82,81,80,79,78,77,76,75,74,73" name="PIR 2012"], and as a result it's shown on the page: http://ggg.jishi.ru/conditer .
The problem is: a client does not want to mess with any code, she want to have WYSIWYG editor, and the best way is to put an input field "Gallery name" to the gallery edit screen, and add the param "name" to a shortcode.
How can I do that? Any hooks, or any ideas what core files are to be changed? I haven't found any info in Codex.