The 45-year-old singer says he went off the rails for a while in between the group's split in 2009 and his current comeback as a solo artist, according to USA Today.
"A lot of personal stuff was going on. I was drinking too much. Then I thought, 'You know what? I'm gonna go live in Spain, get me head together and get some sun on me bones'," says Gallagher.
The singer says his comeback with his new album "As You Were" is not influenced by a desire to recapture his fame but that he simply wanted to get back to making music again.
"I just wanted the universe to play me some songs, which it did. If you're good to rock 'n' roll, it'll be good to you. And I've been good to rock 'n' roll," he says.