Yes, GIEPs only exist in some states. Many states have no funding at all, and negligible programming for GT services. If your state has no code for it, then it is fairly safe to say that there is no GIEP. That does not mean that there are no avenues for GT services, though. Search your state's DOE site for GT key words, like: gifted, talented, academically-advanced, highly-capable.

...pronounced like the long vowel and first letter of the alphabet...