The former Chelsea attacker has been playing for Hebei Fortune China, but will be allowed to join Depor.
"He is a player that I like. I knew him from before and he had a good season with Rayo," said Garitano.
"Now we have to see how he is, as long as you do not see him in a short time ... but I know him and he's a player that can give us many things."
The Frenchman, who will be handed over by Hebei Fortune, will be the second winter signing after the arrival of Ola John.