I love the new Galio but I'm kind of disappointed by his new Gatekeeper skin. :/
A legendary skin is supposed to have a new model, a new voice over, new visual effects, new sound effects and new animations. However, his updated Gatekeeper skin have indeed a different model and a new VO but lacks of different SFX and animations (and maybe VFX). He doesn't have different animations for its movement (except Homeguard) for its joke,its taunt, its dance and its laugh. Few of its VFX look like a recolors of its base skin spells (passive, W's taunt zone) and the SFX are almost the same as its base skin. I know I'm kind of a crybaby about it and that PBE content is subject to change, but to me, the skin isn't complete yet. :/
Here are the spotlight of both Galio and its skin if you want to make your own opinion.