The HQ is in Veilstone City, up the stairs on the top right corner. veilstone city
In the galactic warehouse to the left of the Galactic HQ
You will need Galactic key and this how to get Galactic key you will need to talk to a Galactic team mate by the Galactic HQ.
go to the top of galactic HQ then go all the way to the right
Velistone
you find it in the galactic HQ
At the end of the Galactic warehouse
after you get galactic key go to the HQ with sattilite dish go to the door
get to the top of christopher cool i mean the HQ he must be there
Veilstone galactic HQ
Team galactic isn't in Pokemon black!
In Veilstone city.
its impossible to get to sunnyshore city without beating the galactic HQ and going to the spear pillar.