Worksheeting kids to death is not necessarily the solution, especially with kindergartners. It's not always a matter of giving them more worksheets to do and keeping them busy, but to make the content and material more advanced and challenging. And many, many public schools are reluctant to do this because they want to adhere to the one-size-fits-all mentality and do not fundamentally want kids to be so advanced of their chronological peers in a classroom.
Kindergarten, today, unfortunately is becoming more about behavior management than on play and learning for fun or the sake of knowledge, imo. The original concept of kindergarten was based on play-based or experiential learning, not on rote-based learning and worksheets.
I thought CT was only marginally better than MA or other states in New England with g/t, though I could be wrong. We moved back to MA from NYC when my 2e/pg son was 4.5 yrs old. He was soon doing what your daughter is doing (reading, writing, and doing math). I ended up withdrawing him from a special needs public school program and placing him in a private gifted school as a result. But that school and another school didn't last long and I'm now un/homeschooling him today.
Part of the big problem with g/t kids in kindergarten is that g/t services don't normally kick in until they're older or there's 'evidence' of giftedness in the form of standardized performance-based testing. So do you try to fight for services without the paperwork? You could. I don't know how far you'll get though. A lot is going to depend on the state, the school, the teachers, etc., which will be out of your control. After all, kindergarten is still NOT federally mandated and thus there are a loopholes here with public schools and g/t kids.
Testing is a can worms and can be a rabbit hole with a kindergarten kid. This isn't to say that you won't get the test score you're expecting. It's just there are many variables involved: the tester, the test itself, the day, whether a child is tired or not, and how willing/cooperative they are going to be on any given day or time. I've had my 2e/pg 7.5-yr-old son tested twice so far, but each time there have been issues and I still lack test scores for DYS. He's been blowing off the test (ie. in June he was using his fingers to count on the test when at home he's talking about how +2 and -2 are divisible but 3 is not so easily).
By all means, you could try supplementing/fostering learning at home and see how far you get, what happens, and where it leads you. See what she's interested it and follow it. There's a lot of things you could do to supplement what the public schools do if she stays.
Depending on how gifted your daughter is, you might want to assess your options: public schools, charter schools, private schools, un/homeschooling and what's doable and what's not.
G/t kids often act up when they're bored and this can increase with the level of giftedness, fyi.
