| Acronym | Definition |
|---|
| GTCL➣Goodyear Technical Center Luxembourg |
| GTCL➣Great Circle (navigation) |
| GTCL➣Gujarat Telephone Cables Ltd. (India) |
| GTCL➣Gas Transmission Co. Ltd. (India) |
| GTCL➣Global Testing Corp. Ltd. (Singapore) |
| GTCL➣Graduate Trinity College London |