| Rank | Abbreviation | Meaning |
|---|
| ***** | GBCS | Gregor Bongartz Computer Service
| |
| ***** | GBCS | Greater Brunswick Charter School
| |
| ***** | GBCS | Global Casinos Inc (OTC Bulletin Board [OTCBB])
| |
| ***** | GBCS | German Breast Cancer Study
| |
| ***** | GBCS | Ground Based Common Sensor
| |
| ***** | GBCS | Global Business Communication Solutions
| |
| ***** | GBCS | Global Business Communications System
| |
| ***** | GBCS | Grace Bible College and Seminary
| |
| ***** | GBCS | Global Business Communications Services
| |
| ***** | GBCS | General Board of Church and Society
| |
| **** | GBCS | General Board of Church and Society's
| |
| **** | GBCS | Ground Base Common Sensor
| |
| **** | GBCS | Green Building Consultancy Services
| |
| *** | GBCS | Glitter Black Chartreuse Spot
| |
| ** | GBCS | globose basal cells
| |
| ** | GBCS | Global Business Consulting Services
| |
| ** | GBCS | Grace Brethren Christian School
| |
| * | GBCS | Grace Baptist Christian School
| |
| * | GBCS | Grand Blanc Community Schools
| |
| * | GBCS | Geotextile Baffle Contact System
| |
| * | GBCS | Graduate Business Career Services
| |
| * | GBCS | Grizzly Bear Conservation Strategy
| |
| * | GBCS | Green Bay Christian School
| |
| * | GBCS | Grand Blanc Child Study
| |
| * | GBCS | Guangzhou Biobank Cohort Study
| |