I investigated integrating information from Google Slides to Coda for a work topic this week, and on the same day there was a question in the Coda Community on the same topic.
Here are some examples:
There is a word processing doc, and a slide show. In Google docs, Each Heading and subheading has a separate URL. In Google slides, each slide can have a URL. These URL’s stay consistent. For example, inserting or deleting a Google Slide will not impact previously generated URLs.
At the most simple, one can simply create links to the Google files:
But one can also embed the links, like this:

Want to print your doc?
This is not the way.
Try clicking the ⋯ next to your doc name or using a keyboard shortcut (
) instead.