You are most fortunate to recognize that you can play an important role in fostering your daughter's learning. Some things that help children gain confidence in their own abilities: exposing them to a variety of information; talking to them; taking them to interesting places -- like museums; encouraging them to experiment. While it is true that trips to museums, reading lots of books, and traveling are all very enriching experiences, it is also true that walking in the fields and learning all about the local plants, birds, or trees (noticing similarities and differences, and making discoveries) also sets the stage for learning.
When school is in session again, make an appointment with the classroom teacher and ask about the school's philosophy toward gifted education. The teacher may challenge and provide for quick learners and bright children in the very best ways and not have an official program. Every classroom is different and the dynamics of the students play a major role in determining what the teacher is going to do.
It is always best to see for yourself what is happening and then determine how you can supplement or support what is taking place. Your involvement as a parent is always beneficial.