The short answer is, yes, a man can absolutely pull it off. I have a decant (from the Posh Peasant) and it's stunning. Definitely wearable and bottle worthy (though I've yet to spring for a bottle). FWIW, it's also on Luca Turin's list of best feminines for men to wear.
I'm not sure I'd blind buy it, however. I've never smelled anything else quite like it. Though I'm a Guerlain Zombie®, AL'O seems to be the classic Guerlain most liked by people who don't otherwise like Guerlains.
On the other hand, if you pick up a bottle you should have no trouble unloading it around here. Lots of Basenoters (myself included) have Apres L'Ondee high on our to-buy lists!