In early 1944, Gane was putting out the specialized magazine "Arhiva Genealogică Română", which he described as the continuation of works undertaken by Sever Zotta. Shortly after Romania proclaimed an armistice with Soviet Russia, he was again arrested, then sent to a concentration camp in Caracal, sharing his cell with Panaitescu and the missionary priest Ilarion Felea. According to Felea, the conditions were generally harsh, and food was scarce. In 1946, a number of his books were formally banned through an order issued by Propaganda Minister Petre Constantinescu-Iași. Gane was released from camp by 1948, but singled out for repression by the communist regime. Agents of the Securitate identified him as a figure on the far-right of anti-communist resistance, reporting that Gane was acting as an adviser to Nicolae Petrașcu.