- Greenville County Medical Society
- Greenville Courtyard by Marriott, Greenville, NC
- Greenville Free Medical Clinic
- Greenwich Hospital
- Greenwich United Way
- Grey Wolf Inc.
- Greystone Capital Management Inc.
- Greystone Communities Inc.
- Greystone.Net
- Griffin Hospital
- Griffin Pipe Products Co.
- Griffin Structures Inc.
- Griffin's Liberty Pharmacy
- Griffin-Spalding County United Way
- Grimm Brothers Plastics
- Grinnell Regional Medical Center
- Grinnell State Bank
- Grocery Manufacturers of America
- Grossman and Waldman, LLP
- GroundBreakers
- Group Health Cooperative of Eau Claire
- Group Net
- Group Tour Magazine
- Group Travel Planet
- Grove City Area United Way
- Grove City Medical Center
- Grove Hill Memorial Hospital
- Grove Park Inn
- Grover C. Dils Medical Center
- GRSBDC
- GRTC Transit System
- Grubb and Ellis Harrison and Bates
- Grundy County Memorial Hospital
- GSA, FSS, GFEE
- GSE Construction Company, Inc.
- GSI, Commerce, Inc.
- GTSI Corp.
- Guadalupe County United Way
- Guam Communications Network
- Guardian Elite Medical Services, LLC.
- Guardian Life Insurance Company of America
- Guerbet
- Guest Services, Inc.
- Guidant
- Guidant
- Guide Dog Foundation
- Gulf Coast
- Gulf Coast Medical Center
- Gulf Coast Regional Blood Center
- Gulf Coast Regional Medical Center