The guitarist walked out of the Wonderwall hitmakers in 2009 following a furious bust-up with his singer brother Liam, and although he went on to carve out a successful solo career, he has been dogged with reunion rumours ever since.
Gallagher has repeatedly insisted a comeback for the band is not in the pipeline, but now he has revealed he is open to offers - even though no promoter has ever approached him with the suggestion of an Oasis reunion.
He tells rock magazine Q, "Nobody has made us an offer. I've been in the same room as Liam, and even then nobody's said, 'Weren't Oasis great? You should reform.' But if I was ever going to do it, it would only be for the money. This isn't me putting it out there, by the way. Would I do it for charity? No way. We're not that kind of people.
"For Glastonbury? I don't think Michael Eavis has got enough money. But would we get back together one day? As long as everybody is still alive and still has their hair, it's always a possibility. But only for the money."
Gallagher also cites the example of his fellow British rockers Stone Roses, who faced regular reunion rumours for 15 years until finally announcing their comeback in 2011.
He adds, "Look at the Stone Roses. When you're constantly getting asked if you're going to reform, you can only keep saying, 'No' until you say, 'Yes'... Now the Roses have reformed, no one mentions them any more."