No, they don't. Gangsta rap as a style and thematic focus is a long way from what Kanye does.

Also, it doesn't look like anyone described him as such - the article contains the quote "like isn't he some big fuckin' gangster." The context is that he's making threats, albeit legal ones. So while the would-be creators of Coinye are certainly coming off looking like morons, they haven't made the particular mistake of labeling Kanye as "gangsta."