| Rank | Abbreviation | Meaning |
|---|
| ***** | GATC | Guanine, Adenine, Thymine, Cytosine
| |
| **** | GATC | Grupo de Astrofísica e Cosmologia
| |
| **** | GATC | Genome Analysis and Technology Core
| |
| **** | GATC | German American Trade Council, Inc.
| |
| **** | GATC | Graphic Arts Technology Center
| |
| **** | GATC | Genetic Analysis and Technology Core
| |
| **** | GATC | Grupo de Arquitectura y Tecnología de Computadores
| |
| **** | GATC | Governors and Administrators Training Conference
| |
| **** | GATC | Genesis at the Crossroads
| |
| **** | GATC | Great Adirondack Tool Co.
| |
| **** | GATC | Geriatric Assessment and Treatment Centre
| |
| *** | GATC | Girls and the City
| |
| *** | GATC | German American Trade Council
| |
| *** | GATC | Great American Train Company
| |
| *** | GATC | Gates Automotive Technical Center
| |
| *** | GATC | Gabinetes de Asistencia Técnica al Comercio
| |
| *** | GATC | Georgia Appalachian Trail Club
| |
| *** | GATC | Great Aycliffe Town Council
| |
| *** | GATC | Genotype-specific Approaches to Therapy in Childhood
| |
| ** | GATC | Genetic Analysis Tools and Concepts
| |
| ** | GATC | GlobalTrust Authorized Training Center
| |
| ** | GATC | Gas Appliance Technology Center
| |
| ** | GATC | Government Assistance Technical Centre
| |
| ** | GATC | Gruppo Archeologico del Territorio Cerite
| |
| ** | GATC | General Agreement on Terms and Conditions
| |