Is it possible to set up a portal survey which might ask about 6 questions about the respondent and then on the basis of their responses to the 6 questions it would direct the respondent to one specific survey to be completed. There might be 10 different surveys, but depending on responses to the portal questions any one respondent would be directed to one of the 10 surveys.
Depending on your account, you can build a portal survey by using REDIRECT functions on the THANK YOU page. See the SurveyGizmo documentation for details – https://help.surveygizmo.com/help/redirect-to-a-website#redirect-to-different-urls-based-on-question-answers. You will have to add a REDIRECT function for each of the secondary surveys.
Obviously, you should plan on performing a lot of testing in order to make sure that all of the necessary logic is structured correctly.