The thing I find the most interesting about that post is that it was by an anonymous poster, they were very careful to not offer any company names but had very specific pricing.
So it was either done by design, to make it seem as though it was from someone with valuable leaked information
It was from someone with valuable leaked information who wants to buy or sell Gild based on the info and isn't sure which side of the trade to take. This would be typical of a corporate insider who works at a publicly traded company but doesn't know anything about trading stocks.
It's wishful thinking on my part but it seems real to me. But again I want it to be true so it's not really a valuable opinion.