I'm not from Michigan so I'm not sure, but I believe grade and subject acceleration are up to individual school districts in Michigan. That may be the best option to consider since your district doesn't provide any gifted programming.
I'd check to see if your school district has an acceleration policy. Try the website first so you know what to ask about. Whole grade and subject acceleration can be called a variety of names depending on the district. If you don't find acceleration, try looking under "promotion" or "grade reclassification." You may need to look in a variety of places for information as well. Sometimes information is on the school website; sometimes it's on the district website. It can be hard to find so try looking under "gifted," "special services," "guidance," "student service," "curriculum and instruction," "special education," or "individual learning."
