| Meeting No | Date / location | Host |
| 1st meeting (GSO1) | 24 March 2011 / Brussels | European Union |
| GSO2 | November 2011 / Cape Town | South Africa |
| GSO3 | April 2012 / Hamburg | Germany |
| GSO4 | March 2013 / London | UK |
| Interim | 10 October 2014 | Video conference |
| GSO5 | 15-16 December 2014 / Rome | Italy |
| GSO6 | 20-21 April 2015 / Hamburg | Germany |
| Interim | November 2015 | Video conference |
| GSO7 | February 2016 / Sydney | Australia |
| GSO8 | October 2016 / Cape Town | South Africa |
| GSO9 | May 2017 / Naples | Italy |
| GSO10 | October 2017 / Dubna | Russia |
| GSO11 | 22 May 2018 / Tallahasee | USA |
| GSO12 | 5-7 November 2018 / Oxford | UK |
| GSO13 | 3-5 June 2019 / Roscoff | France |
| GSO14 | 2-4 December 2019 / Shanghai | China |
| Interim | 10 June 2021 | Video conference |
| Interim | 10 February 2022 | Video conference |
| Interim | 1 March 2023 | Video conference |
| GSO15 | 11-14 December 2023 / Tsukuba | Japan |