1970: Ist European Symposium, Estoril, Portugal
1972: 2nd European Symposium, London, UK
1974: 3rd European Symposium, Amsterdam, Holland
1978: 4th European Symposium, Stockholm, Sweden
1981: 5th European Symposium, Rome, Italy
1984: 6th European Symposium, Zagreb, Croatia
1987: 7th European Symposium, Oxford, UK
1990: 8th European Symposium, Mistrust in the matrix. Conflict, cooperation, creativity in groups and institutions, Oxford, UK
1993: 9th European Symposium, Heidelberg, Germany
1996: 10th European Symposium, Copenhagen, Denmark
1999: 11th European Symposium, Budapest, Hungary
2002: 12th European Symposium, The Economy of the Group, Bologna, Italy
2005: 13th European Symposium, Between Matrix and Manuals: Contemporary Challenges in Group Analysis, Molde, Norway
2008: 14th European Symposium, Despair, Dialogue and Desire, Dublin, Ireland
2011: 15th International Symposium, Cultures, Conflict & Creativity, London, UK
2014: 16th International Symposium, Art Meets Science: Exploring Challenges and Changes, Lisbon, Portugal
2017: 17th International Symposium, Crossing Borders: Social, Cultural and Clinical Challenges, Berlin, Germany
2020: 18th International Symposium, The Language of Groups: the power to include and exclude, Barcelona, Spain (THE EVENT WAS CANCELLED)
2020: 1st GASi Online Symposium, The Language of Groups: the power to include and exclude, https://www.gasi-bcn2020.com/