| Abbreviations | Meaning |
 | GOR | Gastroesophageal Reflux |
| NBM | No Bowel Movement; Normal Bone Marrow; Normal Bowel Movement; Nothing By Mouth |
| GPIMH | Guinea Pig Intestinal Mucosal Homogenate |
| GAS | Gastroenterology |
| BSA | Bowel Sounds Active |
| GU | Gastric Ulcer; Genitourinary; Glucose Uptake; Glycogenic Unit; Gonococcal Urethritis; Gravitational Ulcer; Guanethidine |
| GET | Gastric Emptying Time; General Endotracheal [anesthesia]; Graded Treadmill Exercise Test |
| GBD | Granulomatous Bowel Disease |
| URG | Urogastrone |
| IBS | Irritable Bowel Syndrome |
| PCI | Pneumatosis Cystoides Intestinales |
| FACG | Fellow Of The American College Of Gastroenterology |
| GA | Gastric Analysis |
| G-TYPE | Gastric Type |
| GO | Gastro-(o)esophageal |
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