We wrote to school directly. St george's need interview at school. We went there during CNY. During that period, 6 families from HK were interviewed. As far as i know, Yr 10 should be full as informed by others parents in this forum.
If ur daughter really wants to go in Sep 13, pls follow closely with 3 selected schools.
2013 Sep or 2014 Sep? my daughter applied all 4 in Sep last year for 13 Sep...all interviewed. Wy was full, but all others offered...but finally picked another SB school.
Good Luck!