Catalyzes the CoA-dependent transfer of an acetyl group to the 6-O-methyl position of a range of galactosides, glucosides, and lactosides (PubMed:14009486, PubMed:4630409, PubMed:7592843). May assist cellular detoxification by acetylating non-metabolizable pyranosides, thereby preventing their reentry into the cell (Probable). a beta-D-galactoside + acetyl-CoA = a 6-acetyl-beta-D-galactoside + CoA Homotrimer. The N-terminus of this protein is heterogeneous because the initiator methionine is only partially cleaved. Belongs to the transferase hexapeptide repeat family.