The High Flying Birds frontman, who witnessed Farah's 10,000m gold in the crowd of the Olympic Stadium, branded the runner "simply incredible".
"When we got back to old England we'd managed to blag some tickets to that last Saturday at the Olympic stadium," he wrote.
"Now I've been to the biggest sporting events on the planet and I've done some monster shows but to be in that stadium and feel the noise and witness the fitness of the great Mo Farah was simply incredible."
The outspoken left-winger also admitted that "toffs" were correct to talk up London 2012.
"I have to say when the toffs what run our country started spouting waffle about the Olympics and how it would bring out the best in us blah, blah, blah I was - like most of us I expect - thinking, 'Oh f**k off!' And I've never been one for that last night at the proms b*llocks (it's the Celt in me see?)."
Gallagher added: "But I have to say they were right. You couldn't fail to be moved."
> Noel Gallagher mocks Liam's performance at Olympics Closing Ceremony
Noel Gallagher, who rejected an approach for last Sunday's (August 12) Closing Ceremony, recently admitted that he delayed over granting permission for brother Liam's cover of 'Wonderwall'.
London 2012 Olympics Closing Ceremony - photo gallery:
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