- Glass Consulting Group S.r.l. Via Monte Bardone 2 Parma 43100 Italy Phone +390521 242823 Fax +390521 494747 GCG specializes in the glass industry.The society was created in 1984 by glass technicians highly experienced in the glass sector of containers, tableware, perfumery glass and special glass. GCG provides specialized technical assistance by means of the societies it rapresents. Contact: ...www.glassconsultinggroup.it