| Abbreviation | Definition |
|---|---|
| GBSF | Green Baseball/Softball Federation |
| GC | Games in the Conference |
| GCBA | Gold Coast Baseball Association |
| GCL | Gulf Coast League |
| GDBC | Go Deep Baseball Camps |
| GDLL | Greater Dunedin Little League |
| GFB | Greater Florida Baseball |
| GGBL | Greater Gwinnett Baseball League |
| GGBN | Greensboro Grasshoppers Baseball Network |
| GIDP | Ground Into Double Play (Baseball Hitting) |
| GIDP | Grounded Into Double Play (Baseball Pitching) |
| GJB | Goffstown Junior Baseball |
| glbl | Great Lakes Baseball League |
| GLTB | Great Lakes Tournament Baseball |
| GMB | Greater Midwest Baseball |
| GMBA | Georgina Minor Baseball Association |
| GMBA | Guelph Minor Baseball Association |
| GMJBA | Green Mountain Junior Baseball Association (Lakewood, CO) |
| GNBA | Greater Niagara Baseball Association |
| GOGOGOGO | I'm not a robot |