There's bragging and then there's bragging.

If you're talking with other parents about middle school math teachers and your response to questioning is to say that your son doesn't have any of them because he takes calculus online...not bragging, just a statement of fact.
If, otoh, you gratuitously throw the word "gifted" into every discussion, whether it's needed or not, then it's not only bragging, but tiresome, and you need to Stop. It. Now.

"I love it when you two impersonate earthlings."