That's not an argument, that's a statement. If it were an argument (in the sense that a fallacy like ad hominem applies), he would have a set of premises and a conclusion. Also, the comment we're talking about would have to directly state, "BECAUSE he has ties to Gawker, he is THEREFORE wrong" which is not at all what the above comment is saying.
Furthermore, no one is claiming the article is wrong because the author has ties to Gawker. The claim isn't, "Because the author has ties to Gawker, he is therefore wrong", the claim is, "Because he has ties to Gawker, his premises may be biased."
Also, you can't analyze the author's "arguments" because he doesn't provide one.