Gill expects the Argentine’s future to be decided early next month.
United are in talks regarding a £25million deal for Tevez.
“The actual situation will be cleared up in early June,” said Gill.
“Carlos has done very well. We’d like him to stay, but the actual economic situation needs to be clarified.”
He added: “It is an unusual situation. When we did our deal to acquire Carlos two years ago, his economic rights were owned by a company controlled by Kia Joorabchian. That’s a feature of a lot of South American players.
“We have to deal with Kia Joorabchian – we paid a loan fee for two years, then there is a fixed fee we have to pay his company if we wish to take up our option to acquire Carlos, at which point we would own him 100% in football terms, and any other club would deal with us.
“Whatever happens to him in the summer, that situation will be clarified. If he goes to another club in the Premier League, then that club would own him outright.”