My background is that I did a Ph.D. in math. The academic communities that I'm familiar with don't have IQ on their radar, so I think that it would come across as a non sequitur. Relatedly, it might come across as resume padding. I don't think that it's a big deal either way, but I would guess that listing them would, on balance, have a negative impact.

Advising for gifted children available at Cognito Mentoring.