No, but there are literally thousands who cried out in sorrow after Gat had died in SR:TT. It was because of the fans of Saints Row that Johnny Gat was actually resurrected as a still active character to the series. If I recall correctly, there are over ten thousand fans who wanted him back (including me) and they wanted him to go badass again.
Now of course there are some people out there that literally despise Gat, either because of his personality or because they think he is a jerk, but I would like to think that his role in Saints Row more of a special one than the Boss in ways. He has quite a bit of potential left in him. If you recalled all last four Saints Row games, you would know that Gat didn't get a lot of parts in them, usually because of injury or "death" and only reappearing over halfway through SR:IV. I think that Gat getting his own game is only fair since he was mostly incapacitated back then and his inner strength couldn't be played with.
His like for murder might be unjustified at times, but he has used it against evil. He sort of carries the main game changer of things in Saints Row and his murderous abilities can be used for good, so Gat is a good character to have and he of course in some ways does use his own abilities for good, even if it doesn't help civilians in anyway, but he mostly fights off evil of a different kind.
Though in the end, I really think people deserve their own opinions, so if someone doesn't like Gat, it's fine. Though I'm sure the number of fans basically draws him in more as there are a lot of them. Though in my opinion, playing as Gat is fucking awesome! Also love the idea as playing as Kinzie too!