| GAA | Guamal Airport | Guamal | CO |
| GAB | Gabbs Airport | Gabbs | US |
| GAC | Gracias Airport | Gracias | HN |
| GAD | Gadsden Municipal Airport | Gadsden | US |
| GAE | Matmata Airport | Gabes | TN |
| GAF | Ksar Airport | Gafsa | TN |
| GAG | Gage Airport | Gage | US |
| GAH | Gayndah Airport | Gayndah | AU |
| GAI | Montgomery County Airport | Gaithersburg | US |
| GAJ | Junmachi Airport | Yamagata | JP |
| GAK | Gakona Airport | Gakona | US |
| GAL | Galena Airport | Galena | US |
| GAM | Gambell Airport | Gambell | US |
| GAN | Gan/Seenu Airport | Gan Island | MV |
| GAO | Los Canos Airport | Guantanamo | CU |
| GAP | Gusap Airport | Gusap | PG |
| GAQ | Korogoussou Airport | Gao | ML |
| GAR | Garaina Airport | Garaina | PG |
| GAS | Garissa Airport | Garissa | KE |
| GAT | Tallard Airport | Gap | FR |
| GAU | Gopinah Bordoloi Int'l Airport | Guwahati | IN |
| GAV | Gag Island Airport | Gag Island | ID |
| GAW | Gangaw Airport | Gangaw | MM |
| GAX | Yenzi Airport | Gamba | GA |
| GAY | Gaya Airport | Gaya | IN |
| GAZ | Guasopa Airport | Guasopa | PG |
| GBB | Gabala Intl Airport | Gabala | AZ |
| GBC | Gasuke Airport | Gasuke | PG |
| GBD | Great Bend Airport | Great Bend | US |
| GBE | Sir Seretse Khama International Airport | Gaborone | BW |
| GBF | Negarbo Airport | Negarbo | PG |
| GBG | Galesburg Airport | Galesburg | US |
| GBH | Galbraith Lake Airport | Galbraith Lake | US |
| GBI | Aux Ab Airport | Grand Bahama | BS |
| GBJ | Les Bases Airport | Marie Galante | GP |
| GBK | Gbangbatok Airport | Gbangbatok | SL |
| GBL | South Goulburn Island Airport | South Goulburn Island | AU |
| GBM | Garbaharey Airport | Garbaharey | SO |
| GBN | San Giovanni Rotondo Heliport | San Giovanni Rotondo | IT |
| GBO | Baltimore Greenbelt T Airport | Baltimore | US |
| GBP | Gamboola Airport | Gamboola | AU |
| GBQ | Off-Line Point | Muharraq | BH |
| GBR | Great Barrington Airport | Great Barrington | US |
| GBS | Off-Line Point | Port Fitzroy | NZ |
| GBT | Gorgon Airport | Gorgon | IR |
| GBU | Khashm el Girba Airport | Khashm el Girba | SD |
| GBV | Gibb River Airport | Gibb River | AU |
| GBW | Ginbata Airport | Ginbata | AU |
| GBX | Bus Station | Granada | ES |
| GBZ | Great Barrier Island Airport | Great Barrier Island | NZ |
| GCA | Guacamaya Airport | Guacamaya | CO |
| GCC | Campbell County Airport | Gillette | US |
| GCD | Grand Coulee Dam | Electric City | US |
| GCH | Gachsaran Airport | Gachsaran | IR |
| GCI | Guernsey Airport | Guernsey | GG |
| GCJ | Johannesburg-Grand Central Airport | Johannesburg | ZA |
| GCK | Garden City Municipal Airport | Garden City | US |
| GCM | Owen Roberts International Airport | Grand Cayman Island | KY |
| GCN | National Park Airport | Grand Canyon | US |
| GCV | Gravatai Airport | Gravatai | BR |
| GCW | Grand Canyon West Airport | Grand Canyon West | US |
| GCY | Greenville Municipal Airport | Greenville | US |
| GDA | Gounda Airport | Gounda | CF |
| GDC | Donaldson Center Airport | Greenville | US |
| GDD | Gordon Downs Airport | Gordon Downs | AU |
| GDE | Gode Airport | Gode | ET |
| GDG | Magdagachi Airport | Magdagachi | RU |
| GDH | Gold Horn SPB | Golden Horn | US |
| GDI | Gordil Airport | Melle | CF |
| GDJ | Gandajika Airport | Gandajika | CD |
| GDL | Miguel Hidal Airport | Guadalajara | MX |
| GDM | Gardner Municipal Airport | Gardner | US |
| GDN | Rebiechowo Airport | Gdansk | PL |
| GDO | Vare Maria Airport | Guasdualito | VE |
| GDP | Guadalupe Airport | Guadalupe | BR |
| GDQ | Azezo Airport | Gonder | ET |
| GDT | Grand Turk Island Airport | Grand Turk Island | TC |
| GDU | Railway Station | Guadalajara | ES |
| GDV | Dawson Community Airport | Glendive | US |
| GDW | Gladwin Airport | Gladwin | US |
| GDX | Sokol Airport | Magadan | RU |
| GDZ | Gelendzhik Airport | Gelendzhik | RU |
| GEA | Magenta Airport | Noumea | NC |
| GEB | Gebe Airport | Gebe | ID |
| GEC | Gecitkale Airport | Gecitkale | CY |
| GED | Sussex County Airport | Georgetown | US |
| GEE | George Town Airport | George Town | AU |
| GEF | Geva Airstrip | Geva | SB |
| GEG | Spokane International Airport | Spokane | US |
| GEK | Ganes Creek Airport | Ganes Creek | US |
| GEL | Sepe Tiaraju Airport | Santo Angelo | BR |
| GEN | Herrera Railway Station | Puente Genil | ES |
| GEO | Cheddi Jagan International Airport | Georgetown | GY |
| GER | Rafael Cabrera Airport | Nueva Gerona | CU |
| GES | Buayan Airport | General Santos | PH |
| GET | Geraldton Airport | Geraldton | AU |
| GEV | Gallivare Airport | Gallivare | SE |
| GEW | Gewoya Airport | Gewoya | PG |
| GEX | Geelong Airport | Geelong | AU |
| GEY | South Big Horn County Airport | Greybull | US |
| GFA | Malmstrom Air Force Base | Great Falls | US |
| GFB | Togiak Fishery Airport | Togiak Fishery | US |
| GFD | Pope Field | Greenfield | US |
| GFE | Grenfell Airport | Grenfell | AU |
| GFF | Griffith Airport | Griffith | AU |
| GFK | Grand Forks Airport | Grand Forks | US |
| GFL | Warren County Airport | Glens Falls | US |
| GFN | Clarence Valley Airport | Grafton | AU |
| GFO | Bartica Airport | Bartica | GY |
| GFR | Granville Airport | Granville | FR |
| GFY | Grootfontein Airport | Grootfontein | NA |
| GGA | Ferry Port | La Graciosa | ES |
| GGC | Lumbala N' guimbo Airport | Lumbala N'guimbo | AO |
| GGD | Gregory Downs Airport | Gregory Downs | AU |
| GGE | Georgetown Airport | Georgetown | US |
| GGG | Gregg County Airport | Longview | US |
| GGL | Gilgal Airport | Gilgal | CO |
| GGM | Kakamega Airport | Kakamega | KE |
| GGN | Gagnoa Airport | Gagnoa | CI |
| GGO | Guilo Airport | Guilo | CI |
| GGR | Garowe Airport | Garowe | SO |
| GGS | Gobernador Gregores Airport | Gobernador Gregores | AR |
| GGT | Exuma International Airport | George Town | BS |
| GGW | Glasgow International Airport | Glasgow | US |
| GHA | Noumerate Airport | Ghardaia | DZ |
| GHB | Governor's Harbour Airport | Governor's Harbour | BS |
| GHC | Great Harbour Airport | Great Harbour | BS |
| GHE | Garachine Airport | Garachine | PA |
| GHF | Giebelstadt Airport | Giebelstadt | DE |
| GHM | Centerville Municipal Airport | Centerville | US |
| GHN | Guanghan Airport | Guanghan | CN |
| GHT | Ghat Airport | Ghat | LY |
| GHU | Gualeguaychu Airport | Gualeguaychu | AR |
| GIA | Railway Station | Girona | ES |
| GIB | North Front Airport | Gibraltar | GI |
| GIC | Boigu Island Airport | Boigu Island | AU |
| GID | Gitega Airport | Gitega | BI |
| GIF | Gilbert Field Airport | Winter Haven | US |
| GIG | Internacional Airport | Rio De Janeiro | BR |
| GII | Siguiri Airport | Siguiri | GN |
| GIL | Gilgit Airport | Gilgit | PK |
| GIM | Miele Mimbale Airport | Miele Mimbale | GA |
| GIR | Girardot Airport | Girardot | CO |
| GIS | Gisborne Airport | Gisborne | NZ |
| GIT | Geita Airport | Geita | TZ |
| GIU | Sigiriya Slaf Base | Sigiriya | LK |
| GIY | Giyani Airport | Giyani | ZA |
| GIZ | Jazan Airport | Jazan | SA |
| GJA | Guanaja Airport | Guanaja | HN |
| GJB | Bus Station | Guadalajara | ES |
| GJL | Jijel Airport | Jijel | DZ |
| GJM | Guajara-Mirim Airport | Guajara-Mirim | BR |
| GJR | Gjogur Airport | Gjogur | IS |
| GJT | Walker Field | Grand Junction | US |
| GKA | Goroka Airport | Goroka | PG |
| GKD | Gokceada Airport | Gokceada | TR |
| GKE | Air Base | Geilenkirchen | DE |
| GKH | Palungtar Airport | Gorkha | NP |
| GKK | Kooddoo Island Airport | Kooddoo Island | MV |
| GKL | Great Keppel Island Airport | Great Keppel Island | AU |
| GKN | Gulkana Airport | Gulkana | US |
| GKO | Kongoboumba Airport | Kongoboumba | GA |
| GKT | Gatlinburg Airport | Gatlinburg | US |
| GLA | Glasgow International Airport | Glasgow | GB |
| GLB | San Carlos Apache Airport | Globe | US |
| GLC | Geladi Airport | Geladi | ET |
| GLD | Renner Field | Goodland | US |
| GLE | Gainesville Municipal Airport | Gainesville | US |
| GLF | Golfito Airport | Golfito | CR |
| GLG | Glengyle Airport | Glengyle | AU |
| GLH | Greenville Airport | Greenville | US |
| GLI | Glen Innes Airport | Glen Innes | AU |
| GLK | Galcaio Airport | Galcaio | SO |
| GLL | Klanten Airport | Gol | NO |
| GLM | Glenormiston Airport | Glenormiston | AU |
| GLN | Guelmime Airport | Guelmime | MA |
| GLO | Gloucestershire Airport | Gloucester/Cheltenham | GB |
| GLP | Gulgubip Airport | Gulgubip | PG |
| GLQ | Glennallen Airport | Glennallen | US |
| GLR | Otsego County Airport | Gaylord | US |
| GLS | Scholes Field | Galveston | US |
| GLT | Gladstone Airport | Gladstone | AU |
| GLU | Gelephu Airport | Gelephu | BT |
| GLV | Golovin Airport | Golovin | US |
| GLW | Glasgow Municipal Airport | Glasgow | US |
| GLX | Gamarmalamo Airport | Galela | ID |
| GLY | Mount Goldsworthy Airport | Mount Goldsworthy | AU |
| GLZ | Gilze-Rijen AB Airport | Breda | NL |
| GMA | Gemena Airport | Gemena | CD |
| GMB | Gambela Airport | Gambela | ET |
| GMC | Guerima Airport | Guerima | CO |
| GMD | Ben Slimane Airport | Ben Slimane | MA |
| GME | Gomel Airport | Gomel | BY |
| GMI | Gasmata Airport | Gasmata | PG |
| GMM | Gamboma Airport | Gamboma | CG |
| GMN | Greymouth Airport | Greymouth | NZ |
| GMO | Lawanti Airport | Gombe | NG |
| GMP | Gimpo International Airport | Seoul | KR |
| GMR | Totegegie Airport | Totegegie | PF |
| GMS | Guimaraes Airport | Guimaraes | BR |
| GMT | Granite Mountain Airport | Granite Mountain | US |
| GMU | Greenville Downtown Airport | Greenville | US |
| GMV | Monument Valley Airport | Monument Valley Gouldings | US |
| GMZ | La Gomera Airport | San Sebastian/Gomera | ES |
| GNA | Grodno Airport | Grodno | BY |
| GNB | Grenoble-Saint Geoirs Airport | Lyon | FR |
| GND | Point Saline International Airport | Grenada | GD |
| GNE | Off-Line Point | Gent | BE |
| GNF | Gansner Field Airport | Quincy | US |
| GNG | Gooding Airport | Gooding | US |
| GNI | Lyudao Airport | Lyudao (Green Island) | TW |
| GNM | Guanambi Airport | Guanambi | BR |
| GNN | Ginir Airport | Ginir | ET |
| GNR | General Roca Airport | General Roca | AR |
| GNS | Binaka Airport | Gunung Sitoli | ID |
| GNT | Milan Airport | Grants | US |
| GNU | Goodnews Bay Airport | Goodnews Bay | US |
| GNV | Gainesville Regional Airport | Gainesville | US |
| GNY | Guney Anadolu Projesi Airport | Sanliurfa | TR |
| GNZ | Ghanzi Airport | Ghanzi | BW |
| GOA | Cristoforo Colombo Airport | Genoa | IT |
| GOB | Robe Airport | Goba | ET |
| GOC | Gora Airport | Gora | PG |
| GOE | Gonaili Airport | Gonaili | PG |
| GOF | Goodfellow Air Force Base | San Angelo | US |
| GOG | Gobabis Airport | Gobabis | NA |
| GOH | Nuuk Airport | Nuuk | GL |
| GOI | Dabolim Airport | Goa | IN |
| GOJ | Strigino Airport | Nizhny Novgorod | RU |
| GOK | Guthrie Airport | Guthrie | US |
| GOL | State Airport | Gold Beach | US |
| GOM | Goma International Airport | Goma | CD |
| GON | Groton-New London Airport | New London | US |
| GOO | Goondiwindi Airport | Goondiwindi | AU |
| GOP | Gorakhpur Airport | Gorakhpur | IN |
| GOQ | Golmud Airport | Golmud | CN |
| GOR | Gore Airport | Gore | ET |
| GOS | Gosford Airport | Gosford | AU |
| GOT | Landvetter Airport | Gothenburg | SE |
| GOU | Garoua International Airport | Garoua | CM |
| GOV | Gove Airport | Nhulunbuy | AU |
| GOZ | Gorna Oryahovitsa Airport | Gorna Oryahovitsa | BG |
| GPA | Araxos Airport | Patrai | GR |
| GPB | Tancredo Thomaz Faria Airport | Guarapuava | BR |
| GPD | Mount Gordon Mine Airport | Mount Gordon Mine | AU |
| GPI | Guapi Airport | Guapi | CO |
| GPL | Guapiles Airport | Guapiles | CR |
| GPN | Garden Point Airport | Garden Point | AU |
| GPO | General Pico Airport | General Pico | AR |
| GPS | Seymour Airport | Baltra Island | EC |
| GPT | Biloxi Regional Airport | Gulfport | US |
| GPZ | Grand Rapids Airport | Grand Rapids | US |
| GQQ | Galion Airport | Galion | US |
| GRA | Gamarra Airport | Gamarra | CO |
| GRB | Austin-Straubel Field | Green Bay | US |
| GRC | Grand Cess Airport | Grand Cess | LR |
| GRD | Greenwood Airport | Greenwood | US |
| GRE | Greenville Municipal Airport | Greenville | US |
| GRF | Gray Army Air Field | Tacoma | US |
| GRG | Gardez Airport | Gardez | AF |
| GRH | Garuahi Airport | Garuahi | PG |
| GRI | Grand Island Airport | Grand Island | US |
| GRJ | George Airport | George | ZA |
| GRK | Gray Army Air Field | Killeen | US |
| GRL | Garasa Airport | Garasa | PG |
| GRM | Devils Track Airport | Grand Marais | US |
| GRN | Gordon Airport | Gordon | US |
| GRO | Costa Brava Airport | Girona | ES |
| GRP | Gurupi Airport | Gurupi | BR |
| GRQ | Eelde Airport | Groningen | NL |
| GRR | Kent County International Airport | Grand Rapids | US |
| GRS | Corrado Baccarini Airport | Grosseto | IT |
| GRT | Gujrat Airport | Gujrat | PK |
| GRU | Guarulhos International Airport | Sao Paulo | BR |
| GRV | Grozny Airport | Grozny | RU |
| GRW | Graciosa Island Airport | Graciosa Island (Azores) | PT |
| GRX | Federico Garcia Lorca | Granada | ES |
| GRY | Grimsey Airport | Grimsey | IS |
| GRZ | Graz Airport | Graz | AT |
| GSA | Long Pasia Airport | Long Pasia | MY |
| GSB | Seymour Johnson Air Force Base | Goldsboro | US |
| GSC | Gascoyne Junction Airport | Gascoyne Junction | AU |
| GSE | Saeve Airport | Gothenburg | SE |
| GSH | Goshen Airport | Goshen | US |
| GSJ | San Jose Airport | Puerto San Jose | GT |
| GSL | Taltheilei Narrows Airport | Taltheilei Narrows | CA |
| GSM | Dayrestan Airport | Gheshm Island | IR |
| GSN | Mount Gunson Airport | Mount Gunson | AU |
| GSO | Piedmont Triad International Airport | Greensboro/High Point | US |
| GSP | Greenville-Spartanburg Airport | Greenville | US |
| GSQ | Shark el-Owainat International Airport | Shark el-Owainat | EG |
| GSR | Gardo Airport | Gardo | SO |
| GSS | Sabi Sabi Airport | Sabie | ZA |
| GST | Gustavus Airport | Gustavus | US |
| GSU | Gedaref Airport | Gedaref | SD |
| GSY | Grimbsy Town Rail Station | Grimsby | GB |
| GTA | Gatokae Aerodrom | Gatokae | SB |
| GTC | Green Turtle Airport | Green Turtle | BS |
| GTE | Groote Eylandt Airport | Groote Eylandt | AU |
| GTF | Great Falls International Airport | Great Falls | US |
| GTG | Grantsburg Municipal Airport | Grantsburg | US |
| GTI | Guettin Airport | Guettin | DE |
| GTN | Glentanner Airport | Mount Cook | NZ |
| GTO | Djalaluddin Airport | Gorontalo | ID |
| GTP | Grants Pass Airport | Grants Pass | US |
| GTR | Golden Triangle Regional Airport | Columbus | US |
| GTS | The Granites Airport | The Granites | AU |
| GTT | Georgetown Airport | Georgetown | AU |
| GTW | Holesov Airport | Zlin | CZ |
| GTY | Gettysburg Airport | Gettysburg | US |
| GTZ | Kirawira B Airport | Grumeti | TZ |
| GUA | La Aurora Airport | Guatemala City | GT |
| GUB | Guerrero Negro Airport | Guerrero Negro | MX |
| GUC | Gunnison Airport | Gunnison | US |
| GUD | Goundam Airport | Goundam | ML |
| GUE | Guriaso Airport | Guriaso | PG |
| GUF | Edwards Airport | Gulf Shores | US |
| GUG | Guari Airport | Guari | PG |
| GUH | Gunnedah Airport | Gunnedah | AU |
| GUI | Guiria Airport | Guiria | VE |
| GUJ | Guaratingueta Airport | Guaratingueta | BR |
| GUL | Goulburn Airport | Goulburn | AU |
| GUM | A.B. Won Pat International Airport | Guam | GU |
| GUN | Gunter Air Force Base | Montgomery | US |
| GUO | Gualaco Airport | Gualaco | HN |
| GUP | Senator Clark Airport | Gallup | US |
| GUQ | Guanare Airport | Guanare | VE |
| GUR | Gurney Airport | Alotau | PG |
| GUS | Grissom Air Force Base | Peru | US |
| GUT | Guetersloh Airport | Guetersloh | DE |
| GUU | Grundarf Jordur Airport | Grundarf Jordur | IS |
| GUV | Mougulu Airport | Mougulu | PG |
| GUW | Atyrau Airport | Atyrau | KZ |
| GUX | Guna Airport | Guna | IN |
| GUY | Guymon Airport | Guymon | US |
| GUZ | Guarapari Airport | Guarapari | BR |
| GVA | Geneva International Airport | Geneva | CH |
| GVE | Gordonsville Municipal Airport | Gordonsville | US |
| GVI | Green River Airport | Green River | PG |
| GVL | Lee Gilmer Memorial Airport | Gainesville | US |
| GVN | May-Gatka Airport | Sovetskaya Gavan | RU |
| GVP | Greenvale Airport | Greenvale | AU |
| GVR | Governador Valadares Airport | Governador Valadares | BR |
| GVT | Majors Field | Greenville | US |
| GVW | Richards-Gebaur Airport | Grandview | US |
| GVX | Sandviken Airport | Gavle | SE |
| GWA | Gwa Airport | Gwa | MM |
| GWD | Gwadar International Airport | Gwadar | PK |
| GWE | Gweru Airport | Gweru | ZW |
| GWL | Gwalior Airport | Gwalior | IN |
| GWN | Gnarowein Airport | Gnarowein | PG |
| GWO | Leflore Airport | Greenwood | US |
| GWS | Glendwood Springs Municipal Airport | Glenwood Springs | US |
| GWT | Sylt Airport | Westerland | DE |
| GWV | Glendale Airport | Glendale | US |
| GWY | Galway Airport | Galway | IE |
| GXF | Sayun Airport | Sayun | YE |
| GXG | Negage Airport | Negage | AO |
| GXH | Gannan Xiahe Airport | Xiahe | CN |
| GXQ | Ten. Vidal Airport | Coyhaique | CL |
| GXX | Yagoua Airport | Yagoua | CM |
| GXY | Weld County Airport | Greeley | US |
| GYA | Guayaramerin Airport | Guayaramerin | BO |
| GYD | Heydar Aliyev International Airport | Baku | AZ |
| GYE | Simon Bolivar Airport | Guayaquil | EC |
| GYG | Magan Airport | Magan | RU |
| GYI | Gisenyi Airport | Gisenyi | RW |
| GYL | Argyle Airport | Argyle | AU |
| GYM | Gen Jose M Yanez Airport | Guaymas | MX |
| GYN | Santa Genoveva Airport | Goiania | BR |
| GYP | Gympie Airport | Gympie | AU |
| GYR | Litchfield Airport | Goodyear | US |
| GYS | Panlong Airport | Guangyuan | CN |
| GYU | Liupanshan Airport | Guyuan | CN |
| GYY | Gary Regional Airport | Gary | US |
| GZA | Yasser Arafat International | Gaza | PS |
| GZI | Ghazni Airport | Ghazni | AF |
| GZM | Gozo Heliport | Gozo | MT |
| GZO | Nusatupe Airport | Gizo | SB |
| GZP | Gazipasa Airport | Gazipasa | TR |
| GZT | Oguzeli | Gaziantep | TR |
| GZW | Ghazvin Airport | Ghazvin | IR |