The forward is back in France recovering from a hamstring injury that is expected to keep him out for another month.
He insisted preserving Newcastle's Premier League status remained his priority but said a return to Ligue 1 with the club he supported as a boy would fulfill a "childhood dream".
"I am under contract with Newcastle and I'm fine," the former Marseille and Lyon player told Le Parisien.
"First, I must save my club. I only think of that. Help my team and my coach, with whom I get along great. We really want to fight for him.
"The fans are great too. Once we have saved the club, you never know. To sign for PSG would be a childhood dream. If there is a proposal, I will study it with interest.
"If there is a proposal. The 'if' is important. PSG still lives in my heart. Playing there would be a wonderful gift."
Newcastle languish two points above the drop zone after just two wins from their last 10 league games.