Joomla search doesn´t find photos in Gallery2

Hi together, got anybody an idea.

I do have a joomla website and included Gallery2 with the bridge.
I want to use the joomla search for searching the photos of my gallery and display that, but it doesn´t work. I don´t want to use the gallery search, as that would destroy the look.

Maybe I need a special plugin oder have to change some settings. maybe that never works.

Who knows
Thanks