When I was reading the lore it said TPG had a station made in the system. I was wondering if the Serco had them de-orbited or they fell to the planet they were orbiting?

Could you cite the quote? I'm curious now. Logically the sercos would have most likely torn it down due to their dislike of UITs (Neutrals) Back after the war.

I don't even remember mention of a specific station, but the UIT left the system en-masse, starting in 3692, and were basically gone by 3827. TPG was fundamentally a UIT corporation, made up entirely of UIT employees; there's no way they would hang around in what was, at the time, effectively a hostile location for the UIT.

Any infrastructure they left behind would probably have fallen into disrepair and been destroyed, or been adapted for other uses by the Serco.

The M7 station prototype kinda gave off that vibe had a bit of a borg quality to it but you could've imagined a station city inside those gigantic modular blocks.

I loved it used to take new bros sight seeing across the huge station and we would just talk about VO.