Guardian ad litem?

Has anyone ever been appointed a guardian ad litem? My husband and I have just been appointed one for his 5 children. We are fighting for full custody and disagree with the living conditions they have at their moms house. The children are not bathed while with her, teeth aren’t brushed and worst of all they all sleep on the living room floor together. They all live with their mom at their grandma’s house. Would the guardian ad litem see the issue with this or are we fighting for nothing? At our house the kids have bedrooms and they all have their own beds. Any experience with a GAL?