Nice Ginkgo. Will love to see how it progresses.
Years ago, I thought the idea of a ginkgo was great, prehistoric tree and all. Then I looked at several in bonsai shows, usually spring and summer shows, and decided ginkgo do not make a good tree image, not particularly good as bonsai. Then about 7 years ago a freshly dug up stump, from a 30 year old seedling ginkgo, chopped to 12 inches tall, was dropped off at my house. I couldn't say no. By autumn leaf drop I was in love with the species. I will always have at least one if I possibly can.
Your tree is an excellent start, well on it's way.