Are you asking how to enter your GEDMatch ID in WikiTree if you've already entered your DNA test information in here? If that's your question: From 'Gribble-195' at the top right of your profile, choose 'DNA' from the drop-down list. That will take you to 'DNA Ancestors View for g Gribble'. Near the top of that page choose the 'DNA Tests' button. Off to the right of your '23 & me' test information, you can click on 'edit or enter more details.' After you enter your GEDMatch ID be sure to click 'save details'.