Hi Randy,
Ideally if you are using the GTW connector for Marketo your registrant and attendee information will sync in automatically at the conclusion of your webinar.
Any questions that the attendees asked during the webinar do not come over automatically.
What I do is go into GTW, export an excel file called "attendee report" which will include ALL information about that attendee, how long they were logged in, when the logged in, what questions they asked, and anything they filled out on the registration survey. I then take that file and change the title of the column for questions to "lead notes" so it syncs into that field in my Marketo and then into SFDC. I upload the csv list into the webinar program in Marketo and make sure the column I labled with "lead notes" maps to the field "Lead Notes".
Note, this could over write any exisitng notes in the field.
Hope that helps!
Jessica