[Plugin: Genesis Tabs] work on pages

No, it won’t work. Unless you know how to create shortcode for the plugin to be used on the page.

Btw, try creating widgetized template.

This is a tutorial on how to create 404 widgetized page – http://genesisthemes.de/en/2011-08/tutorial-widgetized-404-error-page-in-genesis/

Maybe you can work around a little bit – create a custom page template (give a new name).