Sulaiman Al-Fahim, the billionaire businessman at the centre of the Manchester City takeover, has publicly drawn up a list of big-money targets.
But Gill told BBC Radio 5 Live he is treating it "with a pinch of salt".
"I can't believe he is serious at those levels and, anyway, we are not looking to sell our best players," he added.
"Ultimately we would discuss any offer with (Manchester United manager) Alex (Ferguson) and the owners, as that sort of money is very large for one person.
"But he mentioned (Fernando) Torres and (Cesc) Fabregas in the same article, so I think we can remain calm, wait and see what happens over the course of the next months and years, and not worry about it too much."