def METHOD_NAME(gstin_voucher_map):
    gl_entry = frappe.qb.DocType("GL Entry")
    for gstin, gl_entries in gstin_voucher_map.items():
        frappe.qb.update(gl_entry).set(gl_entry.company_gstin, gstin).where(
            gl_entry.name.isin(gl_entries)
        ).run()