| Abbreviation | Definition |
|---|---|
| GKLX | Gold Kist Incorporated |
| GL | Grade Level |
| GLBU | Chemtura Corporation |
| GLBZ | Trac Lease |
| GLBZ | Trac Lease Incorporated |
| GLC | Great Lakes Central Railroad |
| GLCU | Flex-Van Leasing (Goldline Container) |
| GLCU | Flex-Van Leasing Incorporated |
| GLCX | Great Lakes Carbon |
| GLCX | Great Lakes Carbon Corporation |
| GLKU | Great Lakes Chemical Corporation |
| GLKX | Great Lakes Chemical Corporation |
| GLNU | Bechtel International |
| GLNX | GLNX Corporation |
| GLRX | Georgetown Loop Railroad |
| GLRX | Georgetown Loop Railroad Incorporated |
| GLSR | Gloster Southern Railroad |
| GLSR | Gloster Southern Railroad Corporation |
| GLSX | Glacier State Distribution Services |
| GLSX | Glacier State Distribution Services Incorporated |