Gruppen und topologische Gruppen is a two-days conference organized every semester since 1972. It is devoted mainly to group theory and topological group theory, and related topics. The GtG meeting in winter 2027 will be held at the University of Udine (Italy). The conference starts on Friday 22 January 2027 in the morning and finishes on Saturday 23 January 2027 before lunch. Participants are invited to deliver contributed talks. Registration is available until 15 November 2026.