By Our Corresponent
The trial was linked to the 2016 abortive putsch by a faction in Turkish military.
The trial, focusing on the incidents at land forces headquarters in Ankara, started in 2017 with 132 defendants on trial.
Out of the 92 life sentences given, 12 were aggravated life sentences, state news agency Anadolu reported. Aggravated life sentences are the most severe terms possible in Turkey.
The court acquitted nine people of all charges, while trial will continue for three others, Anadolu reported.
Once an ally of President Recep Tayyip Erdogan, Gulen denies any role in the failed attempt that left more than 250 dead.
Ankara has designated Gulen’s movement, accused of infiltrating key state institutions for decades a terrorist organisation.
Several trials related to the coup are still ongoing in Turkey.