No. Anything you tell a school guidance counsellor is confidential – they can’t tell other school staff, or your parents and whānau, unless you agree to certain things being passed on.
There is an exception to this if there are serious issues. The counsellor can pass on information if they reasonably believe that:
there’s a serious danger in the immediate or foreseeable future, to you or someone else, or
you’re likely to be harmed or abused (whether physically, sexually or emotionally) or neglected, and you’re under 17.