I have tried to create table with multiple header row using surveyGizmo custom table control.Is this possible using surveyGizmo please find attachment.
I have never seen any options within SurveyGizmo that would allow to place sub-headers within grid questions.
Our approach would be to set up each of your sub-headers as separate questions. This would make the survey more user friendly – instead of one massive question they would see easier to understand blocks of questions. It would also make it easier for us to analyze the responses.
Unsolicited advice – It seems that you are converting a paper survey into an online version. The example you provided looks someone made the design decision to build the question so that it fit onto a single page. Since you are building an online version of the survey, you don’t have the same constraints. Be aware of how this question is going to look on a respondent’s screen and take advantage of the flexibility available to you.