My initial thoughts are that it depends on the receiving grade's teacher and the flexibility of the school. Are they willing to do any in-class differentiation or curriculum compacting? I'm guessing you are asking because the year 2 in the GT school isn't working, but can you clarify what issues you're having? Have you asked the current teacher for more challenging work for your DD? And just to clear things up, can you not skip to year 3 in the GT school (ie., are we talking about different schools here, or just different available programs in different grades at the same school)?