UkraNews reports, citing sources, that CEO Sergei Grigorovich told the staff in a meeting this morning that he had decided to close the company. GSC is said to have had between 40-50 employees.
RockPaperShotgun, which has been on top of this story, got in touch with GSC and obtained the ominous: "Sorry, no comments at this point."
STALKER 2 was expected to launch sometime in 2012. We'll update as more information becomes available.
Update: Details are still a mess, but it appears GSC has been shuttered.