"We have had three or four Spanish clubs asking about him because he is playing really well against good teams over there," said the Liverpool manager.
"When I was in Madrid last Monday I had three phone calls from chairmen in Spain wanting to buy him or take him on loan.
"But my idea is to have him here next season. The quality of the player is not in question.
"We are not thinking about selling Mark Gonzalez at all. When we decided to sign him he was injured, but we knew his quality - he is a left winger with pace and skill and now he is showing everyone that.
"He has scored five goals and the manager of Real Sociedad has been speaking really highly of him.
"Real Sociedad were at the bottom of the table when he joined and for him to score five goals for a team like that is not easy. He can play sometimes as a second striker and on the right wing but he is best on the left."