I would check out a wide variety of schools and see what fits your DD nature/personality.
We found a play-based, non-academic same age peers to be the best suited for our DDs. We tried an excellent Montessori, but it did not fit well with one DD and her temperment (the sheer # of kids and multitude of simultaneous activities overwhelmed her). It is a fantastic little school- but 28 kids in one classroom (regardless of age) was just too much for her to process; even thought the environment was calm and nurturing. My only 'overall' complaint was the lack of creative works- the 'works' were meant to be done a certain way and the students had to master before moving on. With cognitive level at one point and fine motor at another- that created a frustrating situation. She did much better in a small setting of 7 kids one year and then 14 kids and then 16 kids. Her 1st grade class was the first experience over 20 kids and they only had 21! That said- both my DDs had/have mild special needs in addition to being academically advanced (not tested, so GT unknown).
You are likely to find that all sorts of preschools worked for different kiddos on this board-- Montessori, Play Based, Emilia-Reggio, Waldorf, etc. The exception being a strict lock-step academic preschool rarely working for kiddos that are ahead academically.
Keep an open mind and the actual day by day interaction with the teacher is a high priority on a good match (instead of basic philosophy- since it can be interpreted/presented so different by by different teachers).