User blog comment:Simbey/Real Talk: Galio/@comment-10256611-20140119154934/@comment-4022742-20140120135154

The problem with Galio is that a lot of people counter him. And his kit is really made to support, so playing him mid is just a harass battle. A decent player will not get poked that much, while Galio does not have the burst to one-hundred-to-zero a champion with his kit.

Galio mid is a "safe" lane, where you farm and don't die, wait for ganks. You'd need a mage like support in bot lane in order to pull it off late game.