Conditions in gulags were fucking dreadful, the same way conditions post any revolution when it came to repressing those who would put down a revolution would be: american prisons post reovlution weren't better, french prisons post revolution weren't better, etc: every single revolution has pretty much ended with a period of terror, and Lenin's wasn't different.
As it remains, the subject isn't gulags (which are, undeniably, work camps, though not death camps), but regular prisons. which existed. Which were the same damn thing as american prisons, except you would come out of it and probably have a house at least.