I told my DS he scored very high on some tests. He took the WISC V as part of an ADHD evaluation and we told him in that context.

DS is often down on himself for one reason or another. Frankly, I just wanted him to know that he has some natural gifts and can go far if he keeps working hard.

It was also becoming apparent- he has a separate curriculum for math and has noticed that he is allowed it read harder books at school than most of the kids in his class.