Glycerol-3-phosphate phosphatase hydrolyzing glycerol-3-phosphate into glycerol (PubMed:26755581). Thereby, regulates the cellular levels of glycerol-3-phosphate a metabolic intermediate of glucose, lipid and energy metabolism. Was also shown to have a 2-phosphoglycolate phosphatase activity and a tyrosine-protein phosphatase activity. However, their physiological relevance is unclear (By similarity). In vitro, has also a phosphatase activity toward ADP, ATP, GDP and GTP (By similarity). H2O + O-phospho-L-tyrosyl-[protein] = L-tyrosyl-[protein] + phosphate H2O + sn-glycerol 1-phosphate = glycerol + phosphate H2O + sn-glycerol 3-phosphate = glycerol + phosphate Binds 1 Mg(2+) ion per subunit. Homodimer. Expression was confirmed in liver, adipose tissue, testis and pancreatic islet. Belongs to the HAD-like hydrolase superfamily. CbbY/CbbZ/Gph/YieH family.