Can you get the gifted ed. teacher leader/ supervisor on the phone and ask point blank whether this test score will matter in selection for this 7-8 class?

A STAR retest isn't that big a deal-- it's 20-30 minutes. But yes, avoiding unnecessary testing is reasonable, especially when the child finds it stressful.

They should NOT be keeping him out of any gifted service he qualifies for, just because of a disability. HK has posted on Lillie-Felton before. I can dig out more documentation if needed.