If it's not possible to combine both needs in one document, then I don't see this situation as an OR, but an AND. I'd have one of each. One IEP for the disabilities, one IEP for the giftedness, they're both legal documents and I'd expect them both to be honored.
I doubt my school district would ever agree to that.
An IEP for a learning disability is not optional for the district - it's required by law. And unless I'm being misled or misreading the information here on this forum, services for giftedness are required by Nevada law, and also not an option.
In my next meeting, I would start finishing a lot of sentences with "as required by law."