You have a Monto Motors (India) made moped with a late model Garelli engine on it. They aquired what was left of European Garelli in the early 90's.
Cosmo's were imported by Cosmopolitan Motors and the Avantis were Imported by J&J Sales in Arizona. They share the same moped models with some different names.
If you check in the photos section, you will probably find what you have. If you have a model that appears different than any of those, let me know. I can ID it.