In a Nutshell
The Information Security Group (In French: Groupe Sécurité de l'Information - GSI) was launched by Prof. Gildas Avoine in 2008. It belonged to the ICTEAM research institute of the UCL, located in Louvain-la-Neuve, Belgium.
In 2013, Prof. Gildas Avoine joined INSA/IRISA in Rennes, France, where he launched (jointly with Prof. Pierre-Alain Fouque) the research group on "EMbedded SEcurity and Cryptographie" (EMSEC). The GSI was consequently active up to 2015, but his activities then shifted to EMSEC. Gildas Avoine is still an invited professor at UCL, though.