GForm is great component where can be defined steps of questionnaire with any HTML. That means images, videos, maps, iframes and so on.
Questionnaire forms, as the name of the component says, are not part of the component. These forms are supposed to be created at Google Drive and then copied to the component. The best thing is that user responses will be stored at Google Drive Spreadsheet so they can be easily processed.
Individual steps can be submitted either by submitting the form of by countdown.
Menu item can point to any step or to list of all steps.