How to Embed a Live Thumbnail of a Gamma Slide into a Google Doc Without Copying Images

Hi folks, I am creating a facilitator guide with my speaking notes in a google doc. I want to e able to embed a thumnail of the gamma slide in the google doc. I don't want to copy/paste the image because I'm still tinkering with the Gamma. any ideas on how to pull this off? I have tried using the direct urls (after making the gamma public), used the embed url etc but haven't had any luck. Any suggestions?