The former defender has revealed that the Rossoneri are constantly keeping an eye on the creative midfielder and could make a move for the Brazilian this summer
The Santos star was believed to be on his way to the Rossoneri ahead of the 2011-12 campaign, but the transfer never materialised in the end.
However, Milan have not forgotten about the 22-year-old playmaker, although Serginho affirmed that there has been no approach yet from Adriano Galliani & Co.
"Ganso could become a possible target for Milan this summer, because they are still monitoring him. Milan are following Ganso. At the moment there is nothing concrete, but they are always monitoring him," Serginho stated to Globoesporte.
"If Ganso is physically well, he gets a lot of attention for his technical quality. He's a player who offers something different and players in this category are of potential interest to the big clubs.
"Ganso is a different kind of athlete in football today. The big clubs are always interested in players like him, including Milan."
Ganso has a contract with Santos until February 2015.