I'm not sure if I've ever built the GGB. I just build additional survey vessels. In the old days anonolies didn't regenerate so the GGB was useless.
The diplomacy and value enhancing achievements don't get built often either. I'm not sure why, just that I don't get around to it and don't want to give up tiles. I guess by the time i can spare the research time to get the techs there noting left that the AI has that i want. What I mean is that the only techs the AI has that I don't are in weapons and logistics and they won't trade those for anything anyway. I only get to the spin control cener later game too. When i don't really need it effect to keep out of wars.
What i do like is the Training center since more troops left over after a battle is a higher population for the planet. And its easy to hold off an invasion.
The No-charge invasion center, or whatever its called, is nice too, really saves some BC by the time the game is done.