Accelerates the intermembrane transfer of various glycolipids. Catalyzes the transfer of various glycosphingolipids between membranes but does not catalyze the transfer of phospholipids. May be involved in the intracellular translocation of glucosylceramides. Monomer. Detected in fibroblasts (at protein level). Detected in fibroblasts and in various cancer cell lines. Belongs to the GLTP family.