galio will still be an anti mage warden
His ult targets allies and is then fixed at that location
He keeps the aoe taunt
He has a knockup and down similar to vi ulti kind of
He has the whirlwind thingy which now seems to stun people
Ad his passive will probably aid him vs magic damage because we don't know about the passive yet but since we do know he will still be anti magic and none of his other abilities seem to have any sort of anti mage aspects i will deduct it will be something anti magic
Might even be the same passive or something different entirely
His main initiation will be the knockdown gapclose which is likely to be dodgeable and requires a charge up effect
his ulti can only target allies also requires a channel
He is very telegraphed like sion but has a shit ton of cc and will likely deal heavy damage like sion
Very good for peeling not so great for engaging you will want an enemy to engage you with their gap close/speed ups and then hammer them and lock them in place
That being said the ultimate will be funny when used with an invisibility champ for surprise engages ^^
or 
. How are you classifying him now and what role do you expect him to be played in?
: Sad face
)
