Okay, for starters, the most obvious point is that a chunk of actual biological non-avian dinosaur preserved in the present day would instantly be the headline for news outlets around the world. When a researcher discovered trace amounts of protein in a Tyrannosaurus bone, it was reported all over the place. But if you do a quick search for "Gasosaurus egg Berlin", you don't see any results from BBC News, New Scientist, National Geographic, Huffington Post, etc. The fifth result is HumourOrTruth. Given that the "news" article dates from a fortnight ago, that should tell you all you need to know right there.
Anyway, why it couldn't be true.
As one of the comments of the article says, an egg starts to go rotten after just a few days, let alone millions of years. Bacteria within the egg start to decay the contents, and that should occur to some degree even if the egg was buried in quicksand or some other substance capable of petrifying it.
Furthermore, even if organic material is petrified, it's still subject to fossilisation. It's still being buried under layers of rock for a colossal span of time, replacing the biological matter with minerals. The survival of any organic substance - a scattering of proteins, invisible to the naked eye - is miraculous and rare.
The article describes the egg as hatching when warmed - suggesting the egg contained living contents. There is no animal on the planet, no matter how embryonic, that can survive for over a hundred million years. An egg's occupant dies very quickly if not kept in proper conditions.
Finally, the article's full of scientific inaccuracy. Gasosaurus' family didn't exist 200 million years ago, and the last non-avian dinosaur was born 66 million years ago, not 100.