You can easily embed Google Slides into your reports and dashboard by following these steps.

To begin, from within Google Slides select File>Share>Publish to web

When the publish to web window opens, switch to the Embed tab, choose your Slide settings, select 'Publish to web', and then copy the iFrame code.

Once you've copied the iFrame code, paste the code into an embed widget's iFrame area.

Once you hit save, the Slide Deck will be displayed on the custom dashboard or report, and you will be able to toggle through the pages.