Hydrolyzes the galactose ester bonds of glycolipids such as galactosylceramide and galactosylsphingosine (PubMed:8281145, PubMed:8399327). Enzyme with very low activity responsible for the lysosomal catabolism of galactosylceramide, a major lipid in myelin, kidney and epithelial cells of small intestine and colon (PubMed:8281145, PubMed:8399327). {ECO:0000269|PubMed:8281145, ECO:0000269|PubMed:8399327}. This is the function of ENSG00000054983 (GALC, galactosylceramidase).