Galio is very strong in the early stages of the game try to play aggressively! From level 6 try to help others with his R. It is very important cuz you will help to gain the advantage of your ally. In later phases of the game, initiate smart, try to use R in battle because they will get statistics. Wish you a nice game this is my first build!

ps: I'm a diamond player. You will easily get to the diamond with this build and champion enjoy :D!