Don’t believe everything you read, even on official websites. The message that can be read on GOG.com says:

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According to Polygamia.pl GOG is not shutting down at all, here’s a source link (Polish). One of the GOG developers Michał Kamiński posted a message on Banker.pl:

Uwaga, data konferencji to pewnie 22gi sroda wczesnym wieczorem. Informacja o tym wkrotce na GOG.com (prosze nie robic paniki po przeczytaniu informacji tam umieszczonych:). Prosze pamietac, ze to konferencja on-line, pierwszy raz w taki sposob organizowana:)
Praktycznie zamknelismy kalendarz konferencji i oficjalne info wyslemy o tym w pon-wt.

Which basically means:

Warning, date of conference it’s most likely Wednesday 22nd in the evening. Information about this soon on GOG.com (don’t panic after reading information posted there:). Please remember that it’s an online conference, organized for the first time:)
We practically closed our conference calendar and official info will be sent on monday, tuesday.

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