Can I receive temporary custody of my daughter if grandma doesn't want guardianship anymore?

Was the guardianship established solely or primarily because you were being deployed? If so, and you are no longer deployed, there would seem to be no need to continue the guardianship. However, you are asking about temporary custody, which may suggest there were other reasons for the guardianship. See counsel of your choice for a detailed conversation on your circumstances and the options that are open for your consideration.