at HQ :p
In the galactic warehouse to the left of the Galactic HQ
the galactic key is in somewhere in the game N.M.I
Near the Team Galactic warehouse.
you get it in team galactic warehouse
When you have got the galactic key from the warehouse then you need to go to the other side where you got the warehouse key.use the galactic team to open the door and then you need to find out where the boss is located.then u free the 3 legendary pokemons!
Veilstone City
talk to the team galactic guy in front of the team galactic building.(In veilstone city)
in the vilstone warehouse next to the galactic building
go to galactic headquarters in veilstone city then you need a galactic key and the storage key to open the door of team galactic's door
The Galactic Grunt in Pastoria City has it. You need to bet the Gym to get it.
u catch girantina and then after that you go to veilstone city and go talk to the team galactic person in front of the galactic warehouse I think galactic warehouse it is one on the team galactic places in veilstone city and then he will go somewhere and drop a key which it will be the storage key. Hope this helped and sorry I cant think of the name of the team galactic place it is the biggest building of the team galactic places (in veilstone city)
In the galactic warehouse.