Gradel is currently rebuilding his career this season on-loan at TFC.
He told 20 Minutes: "You are the one who teaches me (smile). It's good news. Never say never. I am open to everything. My personal situation goes after that of the club.
"After (staying up in Ligue 1), we will see what will be possible.
"We are professional footballers, and the word professional is important. It must be when it is necessary, and the current situation requires it."