To utilize GymStreak Workout Creator GPT, you can provide it with specific demonstrative instructions. For example, if you need a 30-minute leg workout, just prompt 'Suggest a 30-min leg workout'. The GPT is also capable of creating detailed plans such as a 'weekly fitness routine' or 'gym weight loss plan'. Utilizing python, browser, and dalle tools helps in attuning the GPT to your specific needs.