| Ref |
country name |
capital |
currencies |
continent |
flag |
| GAB | GABÓN on to the stamps | Libreville | CFA franc = 100 centimes | Africa |  |
| GAG | GAGAUZIA (MOLDAVIA) on to the stamps | Comrat | leu = 100 bani | Europe |  |
| GAM | GAMBIA on to the stamps | Banjul | dalasi = 100 bututs | Africa |  |
| DAZ | GDANSK on to the stamps | Danzig | mark = 100 pfennig | Europe |  |
| GIE | GEORGIA (EX-URSS) on to the stamps | Tbilisi | lari = 100 tetri | Asia |  |
| GEO | GEORGIA DEL SUR on to the stamps | Grytviken Harbor | pound = 100 pence | Antarctica |  |
| GHA | GHANA on to the stamps | Accra | cedi = 100 pesewas | Africa |  |
| GIB | GIBRALTAR on to the stamps | Gibraltar | pound sterling = 100 pence | Europe |  |
| GBR | GRAN BRETAÑA on to the stamps | London | pound sterling = 20 shillings, pound sterling =100 pence (from 1970) | Europe |  |
| GRA | GRANADA on to the stamps | Saint George`s | Eastern Caribbean dollar = 100 cents | America |  |
| GRS | GRANADINAS DE GRANADA on to the stamps | | East Caribbean dollar = 100 cents | America |  |
| GRE | GRECIA on to the stamps | Athens | drachma = 100 lepta, euro = 100 cents (from 2002) | Europe |  |
| GRC | GRENADA CARRIACOU on to the stamps | | East Caribbean dollar = 100 cents | America |  |
| GRO | GROENLANDIA on to the stamps | Nuuk | Danish krone = 100 öre | America |  |
| GUA | GUATEMALA on to the stamps | Guatemala City | quetzal = 100 centavos | America |  |
| GUE | GUERNSEY on to the stamps | St. Peter Port | pound sterling = 100 pence | Europe |  |
| GUI | GUINEA (CONAKRY) on to the stamps | Conakry | French franc = 100 centimes, syli = 100 caury (1973 to 1986, Guinean franc = 100 centimes (from 1986) | Africa |  |
| GUP | GUINEA ECUATORIAL on to the stamps | Malabo | peseta = 100 centimos (until 1973), ekuele = 100 centimos (1973-1985), CFA franc = 100 centimes (from 1985) | Africa |  |
| GPG | GUINEA PORTUGUESA on to the stamps | Bissau | escudo = 100 centavos | Africa |  |
| GUB | GUINEA-BISÁU on to the stamps | Bissau | peso = 100 centavos, CFA franc = 100 centimes (from 1997) | Africa |  |
| GUY | GUYANA on to the stamps | Georgetown | Guyanese dollar = 100 cents | America |  |