Will medigap in Ohio cover me in California?

I (73F) am moving from California to Ohio. Currently I have Humana G. But, I will be spending 90% of my time in California because of work.

After I move to Ohio, I am planning to get Humana G again.

1. can I still keep my primary physician in California as my primary physician?

2. I want to keep my current network of physicians in California after I move.

Basically, even though I will be moving to Ohio legally, physically I will be spending most of my time in California. What happens?

Thank you.