An agreement between Gala and Inter has been in place for a few days, but no transfer has been finalised.
Sneijder is yet to commit to a deal, with the Holland international said to be stalling as he waits on other offers.
A number of Premier League sides are said to be interested, including Liverpool, and the leading clubs in England are unlikely to have been put off by Inter's valuation.
Gala remain hopeful that Sneijder will agree a switch to Turkey, but they have made it clear that there is only so long they are prepared to wait before turning their attention elsewhere.
"We'll wait another three or four days for Sneijder," said Gala president Unal Aysal.
"If the deal collapses, we have alternatives. The figures quoted in the media are wrong. Our deal with Inter is worth €7.5million (£6.2m).
"The player knows our proposal. Inter are now calculating things with him. Our offer for his wages is below €5.5million. It is also true that our coach Fatih Terim wants Sneijder - he is the first name on the list.
"I see no reason why the transfer should not go through. Even if it does collapse, it won't be the end of the world."