Catalyzes the acylation of glycosyl-4,4'-diaponeurosporenoate, i.e. the esterification of glucose at the C6'' position with the carboxyl group of the C(15) fatty acid 12-methyltetradecanoic acid, to yield staphyloxanthin. This is the last step in the biosynthesis of this orange pigment, present in most staphylococci strains. Carotenoid biosynthesis; staphyloxanthin biosynthesis; staphyloxanthin from farnesyl diphosphate: step 5/5. Belongs to the acyltransferase CrtO family.