| Akhmat Kadyrov Grozny International Airport | GRV | Grozny | RU |
| Almeirim Airport | GGF | Almeirim | BR |
| Antonio B. Won Pat International Airport | GUM | Hagåtña | GU |
| Atyrau International Airport | GUW | Atyrau | KZ |
| Austin Straubel International Airport | GRB | Green Bay | US |
| Binaka Airport | GNS | Gunungsitoli | ID |
| Boigu Island Airport | GIC | Boigu Island | AU |
| Brașov-Ghimbav International Airport | GHV | Brașov (Ghimbav) | RO |
| Central Nebraska Regional Airport | GRI | Grand Island | US |
| Cheddi Jagan International Airport | GEO | Georgetown | GY |
| Coronel Altino Machado Airport | GVR | Governador Valadares | BR |
| Dawson Community Airport | GDV | Glendive | US |
| East Texas Regional Airport | GGG | Longview | US |
| Edward G. Pitka Sr Airport | GAL | Galena | US |
| Exuma International Airport | GGT | Moss Town | BS |
| F.G.L. Airport Granada-Jaén Airport | GRX | Granada | ES |
| Gabala International Airport | GBB | Gabala | AZ |
| Gabès Matmata International Airport | GAE | Gabès | TN |
| Gachsaran Airport | GCH | Gachsaran | IR |
| Gafsa Ksar International Airport | GAF | Gafsa | TN |
| Gagarin International Airport | GSV | Saratov | RU |
| Gainesville Regional Airport | GNV | Gainesville | US |
| Galcaio Airport | GLK | Galcaio | SO |
| Gällivare Airport | GEV | Gällivare | SE |
| Gallup Municipal Airport | GUP | Gallup | US |
| Gamba Airport | GAX | Gamba | GA |
| Gambela Airport | GMB | Gambela | ET |
| Gambell Airport | GAM | Gambell | US |
| Gan International Airport | GAN | Gan | MV |
| Ganja International Airport | GNJ | Ganja | AZ |
| Gannan Xiahe Airport | GXH | Gannan (Xiahe) | CN |
| Gao International Airport | GAQ | Gao | ML |
| Garden City Regional Airport | GCK | Garden City | US |
| Garoua International Airport | GOU | Garoua | CM |
| Garowe Airport | GGR | Garowe | SO |
| Gary/Chicago International Airport | GYY | Gary | US |
| Garze Gesar Airport | GZG | Garzê (Garzê) | CN |
| Gasmata Island Airport | GMI | Gasmata Island | PG |
| Gatokae Aerodrome | GTA | Gatokae | SB |
| Gaya Airport | GAY | Gaya | IN |
| Gaziantep Oğuzeli International Airport | GZT | Gaziantep | TR |
| Gazipaşa-Alanya Airport | GZP | Gazipaşa | TR |
| Gdańsk Lech Wałęsa Airport | GDN | Gdańsk | PL |
| Gelendzhik Airport | GDZ | Gelendzhik | RU |
| Gemena Airport | GMA | Gemena | CD |
| General José María Yáñez International Airport | GYM | Guaymas | MX |
| General Santos International Airport | GES | General Santos | PH |
| Geneva International Airport | GVA | Geneva | CH |
| Genoa Cristoforo Colombo Airport | GOA | Genova (GE) | IT |
| George Airport | GRJ | George | ZA |
| Gerald R. Ford International Airport | GRR | Grand Rapids | US |
| Geraldton Airport | GET | Moonyoonooka | AU |
| Ghat Airport | GHT | Ghat | LY |
| Gibraltar Airport | GIB | Gibraltar | GI |
| Gilgit Airport | GIL | Gilgit | PK |
| Girona-Costa Brava Airport | GRO | Girona | ES |
| Gisborne Airport | GIS | Gisborne | NZ |
| Gitega Airport | GID | Gitega | BI |
| Gladstone Airport | GLT | Gladstone | AU |
| Glasgow Airport | GLA | Glasgow | GB |
| Glasgow Valley County Airport Wokal Field | GGW | Glasgow | US |
| Goa Dabolim International Airport | GOI | Vasco da Gama | IN |
| Gobernador Gregores Airport | GGS | Gobernador Gregores | AR |
| Gode Airport | GDE | Gode | ET |
| Golden Triangle Regional Airport | GTR | Columbus/W Point/Starkville | US |
| Golfito Airport | GLF | Golfito | CR |
| Golmud Airport | GOQ | Golmud | CN |
| Golog Maqên Airport | GMQ | Golog (Maqên) | CN |
| Golovin Airport | GLV | Golovin | US |
| Goma International Airport | GOM | Goma | CD |
| Gombe Lawanti International Airport | GMO | Gombe | NG |
| Gomel Airport | GME | Gomel | BY |
| Gondar Airport | GDQ | Azezo | ET |
| Gondia Airport | GDB | Gondia | IN |
| Goodnews Airport | GNU | Goodnews | US |
| Gorakhpur Airport | GOP | Gorakhpur | IN |
| Goroka Airport | GKA | Goronka | PG |
| Göteborg Landvetter Airport | GOT | Göteborg | SE |
| Gove Airport | GOV | Nhulunbuy | AU |
| Governor's Harbour Airport | GHB | Governor's Harbour | BS |
| Graciosa Airport | GRW | Santa Cruz da Graciosa | PT |
| Grand Canyon National Park Airport | GCN | Grand Canyon - Tusayan | US |
| Grand Forks International Airport | GFK | Grand Forks | US |
| Grand Junction Regional Airport | GJT | Grand Junction | US |
| Graz Airport | GRZ | Feldkirchen bei Graz | AT |
| Great Barrier Aerodrome | GBZ | Claris | NZ |
| Great Falls International Airport | GTF | Great Falls | US |
| Greenville-Spartanburg International Airport | GSP | Greenville/Greer/Spartanburg | US |
| Grenoble Alpes Isère Airport | GNB | Grenoble | FR |
| Griffith Airport | GFF | Griffith | AU |
| Grímsey Airport | GRY | Grímsey/Sandvík | IS |
| Groningen Airport Eelde | GRQ | Groningen | NL |
| Groote Eylandt Airport | GTE | Groote Eylandt | AU |
| Gruyere Airport | GYZ | Cosmo Newbery | AU |
| Guadalajara International Airport | GDL | Guadalajara | MX |
| Guaíra Airport | GGJ | Guaíra | BR |
| Guangyuan Panlong Airport | GYS | Guangyuan (Lizhou) | CN |
| Guapi Airport | GPI | Guapi | CO |
| Guarapari Airport | GUZ | Guarapari | BR |
| Guayaramerín Airport | GYA | Guayaramerín | BO |
| Guernsey Airport | GCI | Saint Peter Port | GG |
| Guerrero Negro Airport | GUB | San Quintín | MX |
| Gulfport Biloxi International Airport | GPT | Gulfport | US |
| Gulkana Airport | GKN | Gulkana | US |
| Gunnison Crested Butte Regional Airport | GUC | Gunnison | US |
| Gurney Airport | GUR | Gurney | PG |
| Gustavus Airport | GST | Gustavus | US |
| Guyuan Liupanshan Airport | GYU | Guyuan (Yuanzhou) | CN |
| Gwalior Airport | GWL | Gwalior | IN |
| Heydar Aliyev International Airport | GYD | Baku | AZ |
| JAGS McCartney International Airport | GDT | Cockburn Town | TC |
| Jalaluddin Airport | GTO | Gorontalo | ID |
| Jijel Ferhat Abbas Airport | GJL | Tahir | DZ |
| Jizan Regional Airport / King Abdullah bin Abdulaziz Airport | GIZ | Jizan | SA |
| José Joaquín de Olmedo International Airport | GYE | Guayaquil | EC |
| Kalaburagi Airport | GBI | Kalaburagi | IN |
| Killeen Regional Airport / Robert Gray Army Airfield | GRK | Fort Cavazos | US |
| Kooddoo Airport | GKK | Huvadhu Atoll | MV |
| La Aurora International Airport | GUA | Guatemala City | GT |
| La Gomera Airport | GMZ | Alajero, La Gomera Island | ES |
| La Laguna Airport | GJA | Guanaja | HN |
| Lefkoniko Airport / Geçitkale Air Base | GEC | Lefkoniko (Geçitkale) | CY |
| Lokpriya Gopinath Bordoloi International Airport | GAU | Guwahati | IN |
| Manohar International Airport | GOX | Mopa | IN |
| Marie-Galante Airport | GBJ | Grand-Bourg | GP |
| Maurice Bishop International Airport | GND | Saint George's | GD |
| Mid Delta Regional Airport | GLH | Greenville | US |
| Negage Airport | GXG | Negage | AO |
| New Gwadar International Airport | GWD | Gurandani | PK |
| Nizhny Novgorod / Strigino International Airport | GOJ | Nizhny Novgorod | RU |
| Northeast Wyoming Regional Airport | GCC | Gillette | US |
| Nouméa Magenta Airport | GEA | Nouméa | NC |
| Noumérat - Moufdi Zakaria Airport | GHA | El Atteuf | DZ |
| Nusatupe Airport | GZO | Gizo | SB |
| Nuuk International Airport | GOH | Nuuk | GL |
| Owen Roberts International Airport | GCM | George Town | KY |
| Patras Araxos Agamemnon Airport | GPA | Patras | GR |
| Piedmont Triad International Airport | GSO | Greensboro | US |
| President Obiang Nguema International Airport | GEM | Mengomeyén | GQ |
| Qeshm International Airport | GSM | Qeshm(Dayrestan) | IR |
| Rafael Cabrera Airport | GER | Nueva Gerona | CU |
| Rio Galeão – Tom Jobim International Airport | GIG | Rio De Janeiro | BR |
| Şanlıurfa GAP Airport | GNY | Şanlıurfa | TR |
| Santa Genoveva International Airport | GYN | Goiânia | BR |
| Santo Ângelo Airport | GEL | Santo Ângelo | BR |
| São Paulo/Guarulhos–Governor André Franco Montoro International Airport | GRU | São Paulo | BR |
| Seiyun Hadhramaut International Airport | GXF | Seiyun | YE |
| Seoul Gimpo International Airport | GMP | Seoul | KR |
| Seymour Galapagos Ecological Airport | GPS | Isla Baltra | EC |
| Sir Seretse Khama International Airport | GBE | Gaborone | BW |
| Sokol Airport | GDX | Magadan | RU |
| Spokane International Airport | GEG | Spokane | US |
| Totegegie Airport | GMR | — | PF |
| Tura Mountain Airport | GOY | Tura | RU |
| Westerland Sylt Airport | GWT | Sylt | DE |
| Yamagata Airport | GAJ | Higashine | JP |