There is heightened speculation the government will reopen the centre following a visit to PNG by Immigration Department Secretary Andrew Metcalfe and Parliamentary Secretary for Pacific Island Affairs Richard Marles.
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But Ms Gillard on Friday would not confirm any such plans, saying only her government was working hard to deal with the problem of people smuggling.
"We have been pursuing discussions in our region and with the United Nations High Commissioner for Refugees on a regional solution," she told reporters.
"When I've got something to announce arising from those discussions then I'll announce it."
Asked about the recent official visits to PNG, Ms Gillard said: "Ministers and officials travel extensively on our region. That's proper and appropriate."
