How might I be able to set up this initial lead capture form purely in html and have that information forward to a marketo form/lead capture. I was looking into Server Side form post, but am not sure that is the correct solution: http://developers.marketo.com/blog/server-side-form-post/
More information on the build specs can be found here: Gmail Custom HTML Ads - Display Specs Help
Thanks in advance!
I haven't implemented this but do see clear instructions on the page how to do it. Just re-iterating couple of things -
If you have a front-end developer to help you out, it sounds pretty straight forward IMHO. Since none of us have access to your Google account, it would be difficult to give you 100% implementation.
That server side POST method does work, so you should be able to post the form data into Marketo. Test, test & test!!!
I have a suggestion, but it's something we used to do with forms 1.0, and I can't guarantee it will work exactly the same with forms 2.0.
Basically, you would create a form in Marketo and then put that form on a blank Marketo landing page. Then approve and visit the live page. From there you can look at the source code for the page by right clicking, and you should be able to copy the form code by taking everything from <form> to </form>.
This will most likely require you to have an experienced web developer to help get the code put in place, and troubleshoot any issue, if you're not familiar with web development yourself.