Asked on www.om.net if he would be departing the French club, the 54-year-old replied: "Yes. It has been a while since I took that decision."
Gerets said he would be leaving the club because of the lack of trust between him and owner Robert Louis-Dreyfus, who told French daily L'Equipe in January he would wait until the end of the season to offer the coach a new contract.
"I got muddled after Robert Louis-Dreyfus's interview," Gerets told local newspaper La Provence.
"I did not understand and I still don't. I think it was a sign. Despite my work, there was a lack of gratitude and most of all a lack of trust.
"If I had been offered a new two-year contract with the same wage or a little bit more before the end of March, I would have signed immediately."
"(Louis-Dreyfus) would have sent a strong message if he had told me as soon as January he wanted me to stay, while we were fourth in the league," Gerets told La Provence.
