Hi Kelly,
thanks for your interest. There are at least two plugins I know of that can achieve this:

PiwigoPress:
Wordpress page: https://wordpress.org/plugins/piwigopress/
Home page: https://www.preining.info/blog/software … wigopress/
Development site: https://github.com/norbusan/piwigopress

PiwigoMedia:
Wordpress page: https://wordpress.org/plugins/piwigomedia/
Home page: https://b.joaoubaldo.com/my-projects/piwigomedia/

I can only speak about PiwigoPress (the first of the above two), as I am the developer of this plugin. It allows you to integrate Piwigo images in a wordpress site in various ways.

If you could explain what you are trying to do, we can help you a bit more.

All the best

Norbert