I read many threads about the secret objective "Keeper of Gates". Now I just want to know whether if it is needed to control the planet in the wormhole systems or not. Since the original card text says:
"I have at least 1(non-fighter) ship in every system containing a wormhole"
I think you should consider the possibility that the card text means what it says. There have been two expansions where it could have been corrected if it was known to be not what was intended.