Can you post the exact embed code / Skuid template merge you’re using? 

To disable the SFDC header, try adding &isdtp=mn to your embed url, as described here: https://developer.salesforce.com/forums/?id=906F000000095wbIAA

Thanks Zach, When I use the code that Google generates, the iframe works fine. No Salesforce Header, no error message. When I replace any of the Google code with a merge variable, it seams like salesforce knows and won’t let it load. I have tried just replacing the email section, the entire url and the entire embed. I created custom fields on the user object and formatted them the same as what Google does. I confirmed the merges are working correctly. The resulting code is exactly the same as Googles. Here is one example. The first embed is what Google generated. The second embed is where I replace the MyName%40mydomain.com with a merge field {{GoogleCalendarEmailformat}}. The merge is working and the code is identical, but the second one doesn’t work.

Make sure you use three braces for the merge, e.g. {{{GoogleCalendarEmailformat}}}

Ah… That is probably it. I’ll give it a try. Did you ever get around to this? https://community.skuid.com/t/google-calendar-rest-example-from-dreamforce-15

That was the problem. I am both excited to have a solution and devastated that I spend an hour troubleshooting it when all I needed was a third pair of mustaches! Thanks for the help. Is there ever a time when you wouldn’t want three braces?

Two braces outputs the value formated (with div’s, the references are a link,…)
Three braces just output the raw value of the field

I see… Thanks Pablo!