| Code Name | City Name | Airport Name | Airport Country |
| GAA | Guamal | Guamal | Colombia |
| GAB | Gabbs | Gabbs | USA, NV |
| GAC | Gracias | Gracias | Honduras |
| GAD | Gadsden | Municipal | USA, AL |
| GAE | Gabes | Gabes | Tunisia |
| GAF | Gafsa | Gafsa | Tunisia |
| GAG | Gage | Gage | USA, OK |
| GAH | Gayndah | Gayndah | Australia |
| GAI | Gaithersburg | Montgomery County | USA, MD |
| GAJ | Yamagata | Junmachi | Japan |
| GAK | Gakona | Gakona | USA, AK |
| GAL | Galena | Galena | USA, AK |
| GAM | Gambell | Gambell | USA, AK |
| GAN | Gan Island | Gan/Seenu | Maldives |
| GAO | Guantanamo | Los Canos | Cuba |
| GAP | Gusap | Gusap | Papua New Guinea |
| GAQ | Gao | Gao | Mali |
| GAR | Garaina | Garaina | Papua New Guinea |
| GAS | Garissa | Garissa | Kenya |
| GAT | Gap | Tallard | France |
| GAU | Gawahati | Borjhar | India |
| GAV | Gag Island | Gag Island | Indonesia |
| GAW | Gangaw | Gangaw | Myanmar |
| GAX | Gamba | Gamba | Gabon |
| GAY | Gaya | Gaya | India |
| GAZ | Guasopa | Guasopa | Papua New Guinea |
| GBA | Big Bay | Big Bay | Vanuatu |
| GBB | Gara Djebilet | Gara Djebilet | Algeria |
| GBC | Gasuke | Gasuke | Papua New Guinea |
| GBD | Great Bend | Great Bend | USA, KS |
| GBE | Gaborone | Sir Seretse Khama Int | Botswana |
| GBF | Negarbo | Negarbo | Papua New Guinea |
| GBG | Galesburg | Galesburg | USA, IL |
| GBH | Galbraith Lake | Galbraith Lake | USA, AK |
| GBI | Grand Bahama | Aux Ab | Bahamas |
| GBJ | Marie Galante | Les Bases | Guadeloupe |
| GBK | Gbangbatok | Gbangbatok | Sierra Leone |
| GBL | Goulburn Island | Goulburn Island | Australia |
| GBM | Garbaharey | Garbaharey | Somalia |
| GBN | San Giovanni Rotondo | San Giovanni Rotondo | Italy |
| GBO | Baltimore | Baltimore Greenbelt T | USA, MD |
| GBP | Gamboola | Gamboola | Australia |
| GBR | Great Barrington | Great Barrington | USA, MA |
| GBS | Port Fitzroy | Port Fitzroy | New Zealand |
| GBU | Khashm El Girba | Khashm El Girba | Sudan |
| GBV | Gibb River | Gibb River | Australia |
| GBZ | Great Barrier Island | Great Barrier Island | New Zealand |
| GCA | Guacamaya | Guacamaya | Colombia |
| GCC | Gillette | Campbell County | USA, WY |
| GCI | Guernsey | Guernsey | Channel Island (UK) |
| GCJ | Johannesburg | Grand Central | South Africa |
| GCK | Garden City | Municipal Airport | USA, KS |
| GCM | Grand Cayman Island | Owen Roberts International | Cayman Islands |
| GCN | Grand Canyon | National Park | USA, AZ |
| GCV | Gravatai | Gravatai | Brazil |
| GCY | Greenville | Municipal | USA, TN |
| GDA | Gounda | Gounda | Central African Republic |
| GDC | Greenville | Donaldson Center | USA, SC |
| GDC | Greer | Donaldson Center | USA, SC |
| GDD | Gordon Downs | Gordon Downs | Australia |
| GDE | Gode/Iddidole | Gode/Iddidole | Ethiopia |
| GDG | Magdagachi | Magdagachi | Russia |
| GDH | Golden Horn | SPB | USA, AK |
| GDI | Gordil | Gordil | Central African Republic |
| GDJ | Gandajika | Gandajika | Congo (DRC) |
| GDL | Guadalajara | Miguel Hidal | Mexico |
| GDM | Gardner | Municipal | USA, MA |
| GDN | Gdansk | Rebiechowo | Poland |
| GDO | Guasdualito | Vare Maria | Venezuela |
| GDP | Guadalupe | Guadalupe | Brazil |
| GDQ | Gondar | Gondar | Ethiopia |
| GDT | Grand Turk Island | Grand Turk Island | Turks and Caicos |
| GDV | Glendive | Dawson Community | USA, MT |
| GDW | Gladwin | Gladwin | USA, MI |
| GDX | Magadan | Magadan | Russia |
| GDZ | Gelendzik | Gelendzik | Russia |
| GEA | Noumea | Magenta | New Caledonia |
| GEB | Gebe | Gebe | Indonesia |
| GEC | Gecitkale | Gecitkale | Cyprus |
| GED | Georgetown | Sussex County | USA, DE |
| GEE | George Town | George Town | Australia |
| GEF | Geva | Geva Airstrip | Solomon Islands |
| GEG | Spokane | International | USA, WA |
| GEI | Green Islands | Green Islands | Papua New Guinea |
| GEK | Ganes Creek | Ganes Creek | USA, AK |
| GEL | Santo Angelo | Sepe Tiaraju | Brazil |
| GEO | Georgetown | Cheddi Jagan International | Guyana |
| GER | Nueva Gerona | Rafael Cabrera | Cuba |
| GES | General Santos | Buayan | Philippines |
| GET | Geraldton | Geraldton | Australia |
| GEV | Gallivare | Gallivare | Sweden |
| GEW | Gewoia | Gewoia | Papua New Guinea |
| GEX | Geelong | Geelong | Australia |
| GEY | Greybull | South Big Horn County | USA, WY |
| GFA | Great Falls | Malmstrom AFB | USA, MT |
| GFB | Togiak Fish | Togiak Fish | USA, AK |
| GFD | Greenfield | Pope Field | USA, IN |
| GFE | Grenfell | Grenfell | Australia |
| GFF | Griffith | Griffith | Australia |
| GFK | Grand Forks | Grand Forks | USA, ND |
| GFL | Glens Falls | Warren County | USA, NY |
| GFN | Grafton | Grafton | Australia |
| GFO | Bartica | Bartica | Guyana |
| GFR | Granville | Granville | France |
| GFY | Grootfontein | Grootfontein | Namibia |
| GGC | Lumbala | Lumbala | Angola |
| GGD | Gregory Downs | Gregory Downs | Australia |
| GGE | Georgetown | Georgetown | USA, SC |
| GGG | Longview | Gregg County Airport | USA, TX |
| GGL | Gilgal | Gilgal | Colombia |
| GGN | Gagnoa | Gagnoa | Cote d'Ivoire |
| GGO | Guiglo | Guiglo | Cote d'Ivoire |
| GGR | Garoe | Garoe | Somalia |
| GGS | Gobernador Gregores | Gobernador Gregores | Argentina |
| GGT | George Town | Exuma International | Bahamas |
| GGW | Glasgow | International | USA, MT |
| GHA | Ghardaia | Noumerate | Algeria |
| GHB | Governors Harbour | Governors Harbour | Bahamas |
| GHC | Great Harbour | Great Harbour | Bahamas |
| GHD | Ghimbi | Ghimbi | Ethiopia |
| GHE | Garachine | Garachine | Panama |
| GHF | Giebelstadt | Giebelstadt | Germany |
| GHK | Gush Katif | Gush Katif | Israel |
| GHM | Centerville | Municipal | USA, TN |
| GHN | Guanghan | Guanghan | PR China |
| GHT | Ghat | Ghat | Libya |
| GHU | Gualeguaychu | Gualeguaychu | Argentina |
| GIB | Gibraltar | North Front | Gibraltar |
| GIC | Boigu Island | Boigu Island | Australia |
| GID | Gitega | Gitega | Burundi |
| GIF | Winter Haven | Gilbert Field | USA, FL |
| GIG | Rio De Janeiro | Internacional | Brazil |
| GII | Siguiri | Siguiri | Guinea |
| GIL | Gilgit | Gilgit | Pakistan |
| GIM | Miele Mimbale | Miele Mimbale | Gabon |
| GIR | Girardot | Girardot | Colombia |
| GIS | Gisborne | Gisborne | New Zealand |
| GIT | Geita | Geita | Tanzania |
| GIY | Giyani | Giyani | South Africa |
| GIZ | Gizan | Gizan | Saudi Arabia |
| GJA | Guanaja | Guanaja | Honduras |
| GJL | Jijel | Jijel | Algeria |
| GJM | Guajara-Mirim | Guajara-Mirim | Brazil |
| GJR | Gjogur | Gjogur | Iceland |
| GJT | Grand Junction | Walker Field | USA, CO |
| GKA | Goroka | Goroka | Papua New Guinea |
| GKE | Geilenkirchen | Geilenkirchen | Germany |
| GKH | Gorkha | Gorkha | Nepal |
| GKL | Great Keppel Island | Great Keppel Island | Australia |
| GKN | Gulkana | Gulkana | USA, AK |
| GKO | Kongoboumba | Kongoboumba | Gabon |
| GKT | Gatlinburg | Gatlinburg | USA, TN |
| GLA | Glasgow | Glasgow International | United Kingdom |
| GLC | Geladi | Geladi | Ethiopia |
| GLD | Goodland | Renner Field | USA, KS |
| GLE | Gainesville | Municipal | USA, TX |
| GLF | Golfito | Golfito | Costa Rica |
| GLG | Glengyle | Glengyle | Australia |
| GLH | Greenville | Greenville | USA, MS |
| GLI | Glen Innes | Glen Innes | Australia |
| GLK | Galcaio | Galcaio | Somalia |
| GLL | Gol | Klanten Airport | Norway |
| GLM | Glenormiston | Glenormiston | Australia |
| GLN | Goulimime | Goulimime | Morocco |
| GLO | Gloucester | Gloucestershire | United Kingdom |
| GLP | Gulgubip | Gulgubip | Papua New Guinea |
| GLQ | Glennallen | Glennallen | USA, AK |
| GLR | Gaylord | Otsego County | USA, MI |
| GLS | Galveston | Scholes Field | USA, TX |
| GLT | Gladstone | Gladstone | Australia |
| GLV | Golovin | Golovin | USA, AK |
| GLW | Glasgow | Municipal | USA, KY |
| GLX | Galela | Galela | Indonesia |
| GLY | Goldsworthy | Goldsworthy | Australia |
| GLZ | Breda | Gilze-Rijen | Netherlands |
| GMA | Gemena | Gemena | Congo (DRC) |
| GMB | Gambela | Gambela | Ethiopia |
| GMC | Guerima | Guerima | Colombia |
| GME | Gomel | Gomel | Belarus |
| GMI | Gasmata Island | Gasmata Island | Papua New Guinea |
| GMM | Gamboma | Gamboma | Congo (ROC) |
| GMN | Greymouth | Greymouth | New Zealand |
| GMP | Seoul | Gimpo International | South Korea |
| GMR | Gambier Is | Gambier Is | French Polynesia |
| GMS | Guimaraes | Guimaraes | Brazil |
| GMT | Granite Mountain | Granite Mountain | USA, AK |
| GMU | Greenville | Downtown | USA, SC |
| GMU | Greer | Downtown | USA, SC |
| GMV | Goulding | Monument Valley | USA, UT |
| GMY | Rheindahlen | Rheindahlen | Germany |
| GMZ | San Sebas de la Gomera | La Gomera | Canary Islands, Spain |
| GNA | Grodna | Grodna | Belarus |
| GNB | Grenoble | Saint Geoirs | France |
| GND | Grenada | Point Saline International | Grenada |
| GNE | Ghent | Ghent | Belgium |
| GNG | Gooding | Gooding | USA, ID |
| GNI | Green Island | Green Island | Taiwan |
| GNM | Guanambi | Guanambi | Brazil |
| GNN | Ghinnir | Ghinnir | Ethiopia |
| GNR | General Roca | General Roca | Argentina |
| GNS | Gunungsitoli | Gunungsitoli | Indonesia |
| GNT | Grants | Milan | USA, NM |
| GNU | Goodnews Bay | Goodnews Bay | USA, AK |
| GNV | Gainesville | J R Alison Municipal | USA, FL |
| GNZ | Ghanzi | Ghanzi | Botswana |
| GOA | Genoa | Cristoforo Colombo | Italy |
| GOB | Goba | Goba | Ethiopia |
| GOC | Gora | Gora | Papua New Guinea |
| GOE | Gonalia | Gonalia | Papua New Guinea |
| GOF | San Angelo | Goodfellow AFB | USA, TX |
| GOG | Gobabis | Gobabis | Namibia |
| GOH | Nuuk | Nuuk | Greenland |
| GOI | Goa | Dabolim | India |
| GOJ | Nizhniy Novgorod | Nizhniy Novgorod | Russia |
| GOK | Guthrie | Guthrie | USA, OK |
| GOL | Gold Beach | State | USA, OR |
| GOM | Goma | Goma | Congo (DRC) |
| GON | Groton | Groton-New London | USA, CT |
| GON | Groton | New London | USA, CT |
| GON | New London | Groton-New London | USA, CT |
| GON | New London | New London | USA, CT |
| GOO | Goondiwindi | Goondiwindi | Australia |
| GOP | Gorakhpur | Gorakhpur | India |
| GOQ | Golmud | Golmud | PR China |
| GOR | Gore | Gore | Ethiopia |
| GOS | Gosford | Gosford | Australia |
| GOT | Gothenburg | Landvetter | Sweden |
| GOU | Garoua | Garoua | Cameroon |
| GOV | Gove | Nhulunbuy | Australia |
| GOY | Gal Oya | Amparai | Sri Lanka |
| GOZ | Gorna Orechovitsa | Gorna Orechovitsa | Bulgaria |
| GPA | Patras | Araxos Airport | Greece |
| GPB | Guarapuava | Tancredo Thomaz Faria | Brazil |
| GPI | Guapi | Guapi | Colombia |
| GPL | Guapiles | Guapiles | Costa Rica |
| GPN | Garden Point | Garden Point | Australia |
| GPO | General Pico | General Pico | Argentina |
| GPS | Galapagos Is | Baltra | Ecuador |
| GPT | Gulfport | Biloxi Regional | USA, MS |
| GPZ | Grand Rapids | Grand Rapids | USA, MN |
| GQJ | Machrihanish | RAF Station | United Kingdom |
| GQQ | Galion | Galion | USA, OH |
| GRA | Gamarra | Gamarra | Colombia |
| GRB | Green Bay | Austin-Straubel Field | USA, WI |
| GRC | Grand Cess | Grand Cess | Liberia |
| GRD | Greenwood | Greenwood | USA, SC |
| GRE | Greenville | Municipal | USA, IL |
| GRF | Tacoma | Gray AAF | USA, WA |
| GRG | Gardez | Gardez | Afghanistan |
| GRH | Garuahi | Garuahi | Papua New Guinea |
| GRI | Grand Island | Grand Island | USA, NE |
| GRJ | George | George | South Africa |
| GRK | Killeen | Gray AAF | USA, TX |
| GRL | Garasa | Garasa | Papua New Guinea |
| GRM | Grand Marais | Devils Track | USA, MN |
| GRN | Gordon | Gordon | USA, NE |
| GRO | Gerona | Costa Brava | Spain |
| GRP | Gurupi | Gurupi | Brazil |
| GRQ | Groningen | Eelde | Netherlands |
| GRR | Grand Rapids | Kent County International | USA, MI |
| GRS | Grosseto | Baccarini | Italy |
| GRT | Gujrat | Gujrat | Pakistan |
| GRU | Sao Paulo | Guarulhos International | Brazil |
| GRV | Groznyj | Groznyj | Russia |
| GRW | Graciosa Island | Graciosa Island | Portugal |
| GRX | Granada | Granada | Spain |
| GRY | Grimsey | Grimsey | Iceland |
| GRZ | Graz | Thalerhof | Austria |
| GSA | Long Pasia | Long Pasia | Malaysia |
| GSB | Goldsboro | Seymour Johnson AFB | USA, NC |
| GSC | Gascoyne Junction | Gascoyne Junction | Australia |
| GSE | Gothenburg | Saeve | Sweden |
| GSH | Goshen | Goshen | USA, IN |
| GSI | Guadalcanal | Guadalcanal | Solomon Islands |
| GSL | Taltheilei Narrows | Taltheilei Narrows | Canada |
| GSM | Gheshm | Gheshm | Iran |
| GSN | Mount Gunson | Mount Gunson | Australia |
| GSO | Greensboro/Winston Salem | Piedmont Triad International Airport | USA, NC |
| GSP | Greer | Greenville-Spartanbur Airport | USA, SC |
| GSQ | Shark Elowainat | Shark Elowainat | Egypt |
| GSR | Gardo | Gardo | Somalia |
| GSS | Sabi Sabi | Sabi Sabi | South Africa |
| GST | Gustavus | Gustavus Airport | USA, AK |
| GSU | Gedaref | Gedaref | Sudan |
| GSY | Grimsby | Binbrook | United Kingdom |
| GTA | Gatokae | Gatokae Aerodrom | Solomon Islands |
| GTB | Genting | Genting | Malaysia |
| GTC | Green Turtle | Green Turtle | Bahamas |
| GTE | Groote Eylandt | Alyangula | Australia |
| GTF | Great Falls | International | USA, MT |
| GTG | Grantsburg | Municipal | USA, WI |
| GTI | Guettin | Guettin | Germany |
| GTK | Sungei Tekai | Sungei Tekai | Malaysia |
| GTN | Mount Cook | Glentanner | New Zealand |
| GTO | Gorontalo | Tolotio | Indonesia |
| GTR | Columbus | Golden Triangle Reg. | USA, MS |
| GTS | Granites | Granites | Australia |
| GTT | Georgetown | Georgetown | Australia |
| GTW | Zlin | Holesov | Czech Republic |
| GTY | Gettysburg | Gettysburg | USA, PA |
| GUA | Guatemala City | La Aurora | Guatemala |
| GUB | Guerrero Negro | Guerrero Negro | Mexico |
| GUC | Gunnison | Gunnison | USA, CO |
| GUD | Goundam | Goundam | Mali |
| GUE | Guriaso | Guriaso | Papua New Guinea |
| GUF | Gulf Shores | Edwards | USA, AL |
| GUG | Guari | Guari | Papua New Guinea |
| GUH | Gunnedah | Gunnedah | Australia |
| GUI | Guiria | Guiria | Venezuela |
| GUJ | Guaratingueta | Guaratingueta | Brazil |
| GUL | Goulburn | Goulburn | Australia |
| GUM | Guam | A.B. Won Pat International | Guam |
| GUN | Montgomery | Gunter AFB | USA, AL |
| GUO | Gualaco | Gualaco | Honduras |
| GUP | Gallup | Senator Clark | USA, NM |
| GUQ | Guanare | Guanare | Venezuela |
| GUR | Alotau | Gurney | Papua New Guinea |
| GUS | Peru | Grissom AFB | USA, IN |
| GUT | Guetersloh | Guetersloh | Germany |
| GUU | Grundarfjordur | Grundarfjordur | Iceland |
| GUV | Mougulu | Mougulu | Papua New Guinea |
| GUW | Atyrau | Atyrau | Kazakhstan |
| GUX | Guna | Guna | India |
| GUY | Guymon | Guymon | USA, OK |
| GUZ | Guarapari | Guarapari | Brazil |
| GVA | Geneva | Geneve-Cointrin | Switzerland |
| GVE | Gordonsville | Municipal | USA, VA |
| GVI | Green River | Green River | Papua New Guinea |
| GVL | Gainesville | Lee Gilmer Memorial | USA, GA |
| GVP | Greenvale | Greenvale | Australia |
| GVR | Governador Valadares | Governador Valadares | Brazil |
| GVT | Greenville | Majors Field | USA, TX |
| GVW | Grandview | Richards-Gebaur | USA, MO |
| GVX | Gavle | Sandviken | Sweden |
| GWA | Gwa | Gwa | Myanmar |
| GWD | Gwadar | Gwadar | Pakistan |
| GWE | Gweru | Gweru | Zimbabwe |
| GWL | Gwalior | Gwalior | India |
| GWN | Gnarowein | Gnarowein | Papua New Guinea |
| GWO | Greenwood | Leflore | USA, MS |
| GWS | Glenwood Springs | Glenwood Springs | USA, CO |
| GWT | Westerland | Westerland | Germany |
| GWV | Glendale | Glendale | USA, WV |
| GWW | Berlin | RAF Gatow | Germany |
| GWY | Galway | Carnmore | Ireland |
| GXF | Seiyun | Seiyun | Yemen |
| GXG | Negage | Negage | Angola |
| GXH | Mildenhall | NAF | United Kingdom |
| GXQ | Coyhaique | Ten. Vidal | Chile |
| GXX | Yagoua | Yagoua | Cameroon |
| GXY | Greeley | Weld County | USA, CO |
| GYA | Guayaramerin | Guayaramerin | Bolivia |
| GYE | Guayaquil | Simon Bolivar | Ecuador |
| GYI | Gisenyi | Gisenyi | Rwanda |
| GYL | Argyle | Argyle | Australia |
| GYM | Guaymas | Gen Jose M Yanez | Mexico |
| GYN | Goiania | Santa Genoveva | Brazil |
| GYP | Gympie | Gympie | Australia |
| GYR | Goodyear | Litchfield | USA, AZ |
| GYS | Guang Yuan | Guang Yuan | PR China |
| GYY | Chicago | Gary Regional | USA, IL |
| GYY | Gary | Regional | USA, IN |
| GZA | Gaza City | Gaza International Airport | Palestinian Territory |
| GZI | Ghazni | Ghazni | Afghanistan |
| GZM | Gozo | Gozo | Malta |
| GZO | Gizo | Gizo | Solomon Islands |
| GZT | Gaziantep | Gaziantep | Turkey |