Is GTA 4's Niko Bellic dead?

Many GTA 4 fans wonder, "Is Niko Bellic dead?"

Niko Bellic. - GTA 4. by VicenzoVegas21 on DeviantArt

Rockstar removed GTA 4 from Steam because of Games for Windows Live

Niko and Packie by B3av3r on DeviantArt

Niko Bellic, GTA Wiki

GTA 4's Ending Choice Isn't As Hard As It Thinks

The Hardest Decisions In Grand Theft Auto IV

Is GTA 4's Niko Bellic dead?

Uncle Vlad GTA IV Mission Guide & Walkthrough

Is GTA 4's Niko Bellic dead?

5 iconic Niko Bellic moments in GTA 4

Which decision do you think makes the most logical sense for Niko to make at the end of GTA 4? : r/GTA

Where did Niko Bellic go after the GTA IV? Did Trevor shoot him? - Quora