What does Gx stand for?

Graded Exercise

Gencor Indus - AMEX symbol

Gencor Industries - AMEX symbol (SAG)

General Executive (FOTI)

Geochron Laboratories Inc. (SAUO)

GEO International Corp. - NYSE symbol (COMM)

Global International Airways (SAUS)

Glycinxylidide - Biochemistry

Great Excitement - Telegraphy (PCTE)

Great Lakes Airlines - ICAO designator (AD)