Currently the GEF has 184 participants:
| Participants | Date of Participation |
| A | |
| Afghanistan | 04/07/1994 |
| Albania | 05/06/1994 |
| Algeria | 05/13/1994 |
| Angola | 10/29/2009 |
| Antigua & Barbuda | 03/29/1994 |
| Argentina | 05/12/1994 |
| Armenia | 06/16/1994 |
| Australia | 06/27/1994 |
| Austria | 06/21/1994 |
| Azerbaijan | 07/24/1995 |
| B | |
| Bahamas | 04/19/1994 |
| Bahrain | 03/11/2020 |
| Bangladesh | 06/22/1994 |
| Barbados | 05/13/1994 |
| Belarus | 03/30/1994 |
| Belgium | 01/30/1995 |
| Belize | 04/29/1994 |
| Benin | 06/29/1994 |
| Bhutan | 12/12/1995 |
| Bolivia | 06/17/1994 |
| Bosnia and Herzegovina | 10/29/2001 |
| Botswana | 07/12/1994 |
| Brazil | 06/13/1994 |
| Bulgaria | 03/22/1994 |
| Burkina Faso | 08/24/1994 |
| Burundi | 03/30/1998 |
| C | |
| Cambodia | 01/31/1995 |
| Cameroon | 10/31/1994 |
| Canada | 07/06/1994 |
| Cabo Verde | 07/18/1994 |
| Central African Republic | 03/23/1995 |
| Chad | 07/27/1994 |
| Chile | 07/01/1994 |
| China | 05/16/1994 |
| Colombia | 06/28/1994 |
| Comoros | 09/05/1995 |
| Congo, Dem. Republic of | 02/06/1997 |
| Congo, Republic of | 09/22/1995 |
| Cook Islands | 05/06/1994 |
| Costa Rica | 05/19/1994 |
| Côte d'Ivoire | 06/24/1994 |
| Croatia, Republic of | 03/04/1994 |
| Cuba | 04/04/1994 |
| Czech Republic | 06/30/1994 |
| D | |
| Denmark | 06/09/1994 |
| Djibouti | 05/24/1994 |
| Dominica | 06/08/1994 |
| Dominican Republic | 04/21/1994 |
| E | |
| Ecuador | 06/23/1994 |
| Egypt | 06/08/1994 |
| El Salvador | 05/20/1994 |
| Equatorial Guinea | 06/12/2003 |
| Eritrea | 12/27/1995 |
| Estonia | 05/12/1994 |
| Eswatini | 5/16/1994 |
| Ethiopia | 10/27/1994 |
| F | |
| Fiji | 05/10/1994 |
| Finland | 06/09/1994 |
| France | 06/20/1994 |
| G | |
| Gabon | 03/20/1998 |
| Gambia | 08/16/1994 |
| Georgia | 07/08/1994 |
| Germany | 06/23/1994 |
| Ghana | 01/16/1997 |
| Greece | 05/11/1994 |
| Grenada | 04/20/1994 |
| Guatemala | 05/20/1994 |
| Guinea | 10/17/1994 |
| Guinea - Bissau | 05/02/1995 |
| Guyana | 05/12/1994 |
| H | |
| Haiti | 05/10/1994 |
| Honduras | 09/06/1994 |
| Hungary | 06/22/1994 |
| I | |
| India | 05/12/1994 |
| Indonesia | 06/29/1994 |
| Iran (I.R.) | 05/25/1994 |
| Iraq | 02/03/2010 |
| Ireland | 06/14/1994 |
| Israel | 03/19/1995 |
| Italy | 06/28/1994 |
| J | |
| Jamaica | 06/29/1994 |
| Japan | 06/27/1994 |
| Jordan | 05/10/1994 |
| K | |
| Kazakhstan | 03/30/1998 |
| Kenya | 05/25/1994 |
| Kiribati | 05/10/1994 |
| Korea (D.P.R.) | 05/06/1994 |
| Korea (Rep.) | 05/03/1994 |
| Kosovo | 03/11/2010 |
| Kuwait | 06/05/2010 |
| Kyrgyzstan | 01/09/1997 |
| L | |
| Lao (P.D.R.) | 08/02/1994 |
| Latvia | 06/27/1994 |
| Lebanon | 07/21/1994 |
| Lesotho | 06/29/1994 |
| Liberia | 12/05/2000 |
| Libya | 12/13/1994 |
| Lithuania | 05/13/1994 |
| Luxembourg | 04/28/1995 |
| M | |
| Madagascar | 07/14/1994 |
| Malawi | 02/23/1996 |
| Malaysia | 05/04/1994 |
| Maldives | 08/25/1994 |
| Mali | 07/04/1994 |
| Malta | 07/27/1994 |
| Marshall Islands | 04/15/1994 |
| Mauritania | 05/08/1994 |
| Mauritius | 07/04/1994 |
| Mexico | 05/17/1994 |
| Micronesia (F.S.) | 04/26/1994 |
| Moldova | 10/27/1995 |
| Mongolia | 04/14/1994 |
| Montenegro | 08/25/2006 |
| Morocco | 06/29/1994 |
| Mozambique | 12/27/1995 |
| Myanmar | 05/13/1994 |
| N | |
| Namibia | 04/30/2001 |
| Nauru | 05/05/1994 |
| Nepal | 08/10/1994 |
| Netherlands | 06/20/1994 |
| New Zealand | 05/18/1994 |
| Nicaragua | 05/19/1994 |
| Niger | 08/23/1994 |
| Nigeria | 07/12/1994 |
| Niue | 05/04/1994 |
| North Macedonia | 07/07/1994 |
| Norway | 07/01/1994 |
| P | |
| Pakistan | 04/08/1994 |
| Palau, Republic of | 10/12/1998 |
| Panama | 04/07/1994 |
| Papua New Guinea | 05/06/1994 |
| Paraguay | 02/15/1995 |
| Peru | 06/14/1994 |
| Philippines | 06/16/1994 |
| Poland | 04/18/1994 |
| Portugal | 06/17/1994 |
| R | |
| Romania | 07/29/1994 |
| Russian Federation | 06/23/1994 |
| Rwanda | 06/11/2002 |
| S | |
| Saint Lucia | 03/31/1994 |
| Saint Vincent & the Grenadines | 05/04/1994 |
| Samoa | 03/28/1994 |
| Sao Tome and Principe | 06/07/2002 |
| Senegal | 04/07/1994 |
| Serbia | 09/16/2001 |
| Seychelles, Republic of | 09/20/2001 |
| Sierra Leone | 09/06/1994 |
| Slovak Republic | 11/01/1994 |
| Slovenia | 07/12/1994 |
| Solomon Islands | 04/16/1994 |
| South Africa | 07/06/1994 |
| South Sudan | 04/25/2013 |
| Somalia | 04/11/2007 |
| Spain | 06/09/1994 |
| Sri Lanka | 05/26/1994 |
| St. Kitts and Nevis | 07/25/1994 |
| Sudan | 06/14/1994 |
| Suriname | 05/12/1994 |
| Sweden | 06/28/1994 |
| Switzerland | 07/01/1994 |
| Syria | 04/15/1996 |
| T | |
| Tajikistan | 10/01/1999 |
| Tanzania | 03/26/1996 |
| Thailand | 06/30/1994 |
| Timor-Leste (Democratic Republic of) | 10/06/2003 |
| Togo | 07/21/1994 |
| Tonga | 05/04/1994 |
| Trinidad and Tobago | 05/19/1994 |
| Tunisia | 05/13/1994 |
| Turkey | 07/06/1994 |
| Turkmenistan | 05/29/1997 |
| Tuvalu | 05/03/1994 |
| U | |
| Uganda | 06/28/1994 |
| Ukraine | 06/15/1994 |
| United Kingdom | 06/13/1994 |
| United States | 06/24/1994 |
| Uruguay | 04/22/1994 |
| Uzbekistan | 04/05/1995 |
| V | |
| Vanuatu | 05/19/1994 |
| Venezuela, Republica Bolivariana de | 07/01/1994 |
| Vietnam | 05/12/1994 |
| Y | |
| Yemen | 03/30/1994 |
| Z | |
| Zambia | 06/13/1994 |
| Zimbabwe | 07/07/1994 |