Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This is a build for galio playin in a lane (not mid). Galio is very effective early game and as soon as you get your Ulti it enables easy kills at level 6, use this to the best of your ability. Galio is very good at initiating team fights and will usually die when initiating, but it will allow your team to merk their whole team, if you get Guardian Angel you can come back after you initiate and cause more havoc, gl hf.