considering the information is up to date
Actually you do need to be a little careful about this. Most of the data in the Wiki was specifically for DL. A lot of information has also been updated for DA and usually it indicates this. But I don't think there's a lot of information on TA and how it may be different from previous versions.
https://www.galciv.wikia.com/wiki/Galactic_Civilizations_Wiki is the main entry point. There's a link in the Databanks section (https://www.galciv2.com/Databanks.aspx) of the forum but it's been broken for awhile now. The Wiki is a good resource but not a total replacement for being able to ask your specific question here in the forum.
The other thing is that although the low PQ planets have the stated *growth* limit from the Wiki article, you can "bus" pop to a planet using a colony ship or transport and the planet will be able to sustain the normal 6B pop that the initial colony building supports, it's just that the planets pop won't grow above it's stated limit.
Most folks don't bother with bussing pop but population does effect score and in medium galaxy games and below, I sometimes will "fill up" my low PQ planets to 6B. It doesn't have much impact to score, particularly if done late in the game but if done early it does have a minor impact if you care about such things.