Glycerophosphoryl diester phosphodiesterase hydrolyzes deacylated phospholipids to G3P and the corresponding alcohols. Has a specific affinity for human immunoglobulin D myeloma protein. a sn-glycero-3-phosphodiester + H2O = an alcohol + H(+) + sn-glycerol 3-phosphate Binds 1 Ca(2+) ion per subunit. Contains both ester- and amide-linked fatty acids. The sequence shown is that of strains NTHI 772 and RD / KW20. Belongs to the glycerophosphoryl diester phosphodiesterase family.