The amount of a granulocyte-macrophage colony-stimulating factor receptor subunit alpha (human) when measured in cerebrospinal fluid. The trait is level of granulocyte-macrophage colony-stimulating factor receptor subunit alpha (human) in cerebrospinal fluid (OBA_2057194, an Ontology of Biological Attributes identifier). Also known as: cerebrospinal fluid granulocyte-macrophage colony-stimulating factor receptor subunit alpha (human) amount.