I see HotshotGG playing him, is Galio good now or is he just trolling?

he's a conditional champ

if the enemy is full AP he's king

Or if you're playing a "Press R to Penta" composition.

Hotshot's trying to expand his character list beyond Cho and Nidalee. He's been trying to pick up Morde and Galio.

Galio is becomming a little more seen due to his buffs, not because hotshot is playing him.

Learn to think for yourself. Champs can be "bad" but are fun to play. It's a game. Just have fun.

I wouldn't say he's good, but he's at least okay. The extra damage reduction on his ult makes it a lot easier to turn a fight around at low HP. It's still easy to break his ult if he doesnt get all 5 of you though.

I've always played galio and if you're comfortable enough to switch lanes and get good with hitting with your q you will dominate the laning phase. just switch if they have heals and harass the enemy into the ground then proceed to shield your carry and watch as their jaws drop because you just made him like 1000 gold tankier with a level 1 ability