| Abbreviation | Definition |
|---|---|
| FM | Frequency Modulation |
| FMT | Frequency Measuring Test |
| FPSV | Frequency Protected Service Volume |
| FRC | Frankford Radio Club |
| FRC | Fullovit Radio Club |
| FRPA | Fixed Reception Pattern Antenna |
| FSVM | Frequency Selective Volt Meter |
| G/W | Ground Wave |
| GARA | Greensboro Amateur Radio Association |
| GARY | Gang Amateur Radio Youth |
| GLETN | Great Lakes Emergency Traffic Network |
| GLETN | Great Lakes Emergency & Traffic Network |
| GLETN | Great Lakes Emergency and Traffic Network |
| GLETN | Great Lakes Emergency Traffic Network |
| GMT | Greenwich Mean Time |
| GMT | Greenwich Mean Time (replaced by UT in 1928, then UTC in 1960) |
| GN | Good Night |
| GNSS | Global Navigation Satellite System |
| GROL | General Radiotelephone Operator License |
| GRS | General Radio Service |