I need to see who has responded and who has not responded to the survey in the survey results
How was your survey distributed? Did you send it via email campaign in SurveyGizmo? If so, this article should help:
If you didn’t send the survey via email campaign, your best bet is probably to pull a CSV export file:
This CSV file will include all recorded responses and will not show those who have not responded.
Hope this gives you some options!