| Term | Full Form | Category |
|---|---|---|
| WGSI | Wang Government Services Incorporated | Others |
| WGSI | Water Group Systems International | Others |
| WGSI | Westcoast Gas Services Inc | Others |
| WGSI | Westcoast Gas Services, Inc. | Others |
| WGSI | Wild Goose Storage, Inc. | Others |
| WGSI | Within Grade Salary Increase | Others |
| WGSI | Women And Gender Studies Institute | Others |
| WGSI | Working Group for Sustainable Industry | Others |
| WGSI | Working Group on Sea Ice | Others |
| WGSI | Working Group on Strategic Investment | Others |