Tevez is currently in his native Argentina having flown home without City's permission last month.
His representatives have been speaking to officials at Milan about a possible move, but a sticking point has been the terms of the deal, with Milan wanting Tevez on loan initially and City keen to sell the player immediately.
Galliani said, according to Italian Eurosport: "On Thursday we have an appointment with Manchester City for Tevez but it will probably not be the decisive one to conclude negotiations."
Galliani told Radio 1 Rai: "We're not going to take him outright: we're offering a free loan with the right to buy in June.
"The player wants to come to us and not PSG (Paris St Germain) and we hope City accept the offer."