Is it above 5 to sit for the IQ test? Too young, the result is not reliable. My son did it in 4.5 (psychologist explained to me the result may not relaible S-B, due to the age and database.) and 7.5.
If yes, aim for P1 instead of KG. If the school has curricullum to accommodate gifted kid with proven track record is the best.
God grant me the serenity
to accept the things I cannot change;
courage to change the things I can;
and wisdom to know the difference.