Can a state guardian be overruled?

Sibling refused family to see mom this went on for months then elder abuse was called because we did not know if she was alive. Went to probate now a state guardian is appointed to be in charge since the rest of the family do not get along. How do I go about finding out moms current medical condition is. She had had three strokes and dementia and is legally blind. She cannot walk or feed herself, how do I get her into hospice care at home where she wanted to die, the guardian seems to think he is god and whatever he says goes this is my mom she does not deserve her only wish in this life to be home when she passes how do I over ride this state person who is impossible to talk with.