The current Rank 1 Galio is a 600 LP support main who is dunking on the melee support meta. Here's his build, runes and spells maxing order. : r/galiomains
Wild Rift Galio guide: Best runes, items, tips, more | GINX Esports TV
Galio support guide | Learn how to win in botlane | League of legends - YouTube
LoL Guide, Build for Galio, Support, S10 - Millenium