This addon does what it's written, not what's in the picture.
The picture shows an example of providing different feedbacks for each incorrect answer, while this is not possible with Google Forms (at the current date). The specific example in the picture gives the message "Note: this MULTIPLE CHOICE question is not completely compatible with Google's quizzes. Individual feedback items for each answer are not (yet?) supported by Google. Feedback is aggregated into only CORRECT and INCORRECT."
So, if you hope to have more capabilities or question types than those that are already in Google Forms, this is not the addon for you; if you just need to translate from GIFT, it is probably good.