If you register for Gottman Connect's Relationship Checkup, you'll be automatically given a free credit on your account. You can use this free credit to test out and walk through the questionnaire before adding couples. You can also use it to walk through the questionnaire with your couple.
After completing the questionnaire, you will be able to review the questions anytime (as well as your answers) via the clinician report.
There is no other way to currently view the Gottman Connect Gottman Relationship Checkup questions prior to working with a couple.