In order to participate, all you need is a grandchild-grandparent pair of Gedmatch kit numbers (this could be you and a grandparent, your child and your parent, or you and a grandchild). Contact information is optional and will only be used if further questions arise, all contact information and kit numbers will be kept strictly confidential and not sold or shared with third parties. Please ensure that you get permission from anyone whose kit number you submit (parents may provide consent for minor children, people who are deceased do not need to provide consent). Consent may be written (i.e. via email) or oral (i.e. via phone call).
You can submit as many pairs as you have kit # available (i.e. if you had 4 grandchildren kits matched with one grandparent, then you can make 4 submissions). Only one paternal or one maternal grandparent is needed - grandmothers are preferred (for X chromosome information) but any grandparents will provide useful data. Look for results in the future on Family History Fanatics YouTube Channel.