You might be right indigo, but that would depend an awful lot on your population size.
Yes, if gifted are .1% (1%, 2%, 5%, 10%) there would statistically need to be a population of 2000 (200, 100, 40, 20) in your child's age and/or grade and/or cluster to find a second child of your child's similar relative ability.
In a gifted micro school, students would typically be in a cluster with a mix of ages as gifts and abilities may vary by student. There may also be times of independent learning at one's own level and pacing.
who are going to get along.
This may be heavily influenced by the leadership: teachers, administrators, parents. To a great degree, children can learn to be compatible classmates.
