There are a lot of gifted options from what I remember in the Denver and surrounding areas but I don't know anything about Boulder which is a bit farther out from Denver metro.
I think I remember seeing lists on the gifted development centers website of gifted availability schools for that area, and they are in Denver so they may be able to point you in other directions.
We lived in Colorado Springs for years so I know they have options there but thats quite a ways from Boulder. Good luck, its hard moving and figuring everything out when you really need more than just "a school" so to speak.
