In 1970, he was arrested and investigated for violating state security through treason of service secrets and economic espionage, being considered a dangerous agitator among young people.
In July 1985 he was arrested again and sentenced to 1 year and 6 months in prison on the basis of article 166 of the Criminal Code at that time - "propaganda against the social order", being accused of broadcasting anti-communist manifestos.
Subsequently, according to his own confessions, Gelu Voican Voiculescu was also the actor of a common law process, being accused of cheating at the expense of the public had by falsifying some statements and appropriation of money for some trips.
The alleged reasons for his arrest are, according to Gelu Voican, the fact that he owned copies of dozens of books on topics related to esotericism and the initiatory aspects of secret societies.
He participated as a delegate of the National Salvation Front, along with Victor Atanasie Stănculescu and Virgil Măgureanu, at the trial of Nicolae Ceaușescu on December 25, 1989, and at the execution of the communist leader.
On December 31, 1989, immediately after the arrest the Securitate head Iulian Vlad and his close associates, National Salvation Front Council chairman Ion Iliescu appointed Gelu Voican Voiculescu, at that time deputy prime minister in the Provisional Government, as commander of the former "structures "Department of State Security".
[3] Starting January 2, 1990, Nicolae Militaru, together with Gelu Voican Voiculescu, coordinated the takeover by MApN of the Securitate, passing to the analysis of its organizational chart and to the creation of future information structures of Romania.
[4] Former Securitate Officer Liviu Turcu stated in a November 2006 interview on the show "Marius Tuca Show" at Antena 1 that "in the final phase of the events of December 1989", Gelu Voican Voiculescu took a team of armed soldiers "under extremely delicate and uncertain conditions" and he put up a military unit of the Foreign Intelligence Service, urging them to give him the network of Romanian informers from the West.
[5] Voican defended himself by stating that Liviu Turcu wants to compromise him as an active „participant in the 1989“ revolution, adding that he was not a collaborator of the Securitate, and he had no ties with it.