| Acronym | Definition |
|---|
| GLCA➣Glen Canyon National Recreation Area (US National Park Service) |
| GLCA➣Great Lakes College Association |
| GLCA➣Great Lakes Construction Alliance |
| GLCA➣Great Lakes Curling Association (Cleveland Heights, Ohio) |
| GLCA➣Great Lakes Captains Association (Sault Sainte Marie, MI) |
| GLCA➣Great Lakes Charter Annex (water resource agreement) |