GEMS Wellington is brand new school, opening this September. So there is no students yet. I've met principal and registered my daughter for FS1. I believe this school has potential to be one of the best school in Qatar. But the reason why we choose this school is there are not so much option, if you google about school in Qatar, you'll know that it's veeeeeeeeery difficult to get school seat.
American stream one is GEMS American Academy established last September. These schools are located next to each other. Wellington is British curriculum.
One and only negative thing about school is the location, it's in Al Wakrah, bit far from Doha.
Since you are relocating, just choose accommodation in Al Wakrah or area close to Al Wakrah.