That sounds reasonable, but I'd have a couple questions for you. I went back and looked at your prior threads.

1) Do you have any idea what the kids who they did accept look like? In other words, will this GT school be a good fit for a child like your ds, who is potentially HG and 2e, or are they mostly accepting, and thus best serving, compliant high achievers?
2) If they had something like 125 spots to fill, have they filled them all or is there room to take an extra kid or two on appeal?
3) What is the rate of appeal and what is the rate of acceptance post-appeal?
4) What does the alternative school placement look like? Will he be much more unhappy and poorly served in the alternative placement than he would be in this placement? If so, is there any way to get a psych or someone who did some of his private testing to write a letter to that effect to include with your appeal?