The "Live Forever" singer, who is famous for wearing and designing parkas, has posted a message on Instagram offering up tour tickets in return for a generous gesture.
"Calling all Parka Monkeys," he wrote. "No one plans on being homeless. Yet 5,000 people in the UK sleep on the streets on any given night. We're asking you to help this winter by donating a coat or parka. In return for your donation, you'll have the chance to win a pair of tickets, plus a meet and greet with Liam."
The rocker's U.K. tour begins in Cardiff, Wales next week.
Earlier this week, Gallagher received the first-ever Rock Icon Award at the MTV European Music Awards.