"Black Family Guy" pretty much fits it to a tee.
The jokes, the cutaway gags... the overall feel and tone of the show is FG. It has it's minor differences (at least Donna isn't a terrible mother, like Lois), but for the most part, it's way too similar in many aspects.
Honestly? I still can't help but question why this show even exists to begin with. Cleveland is no lead man; he was a mildly amusing supporting character from another show, and that's about it. He's not the kind of guy to build an entire series around. The whole concept just feels lazy. It's basically a "take a character people know, give them their own show/spin-off = instant hit" type of situation.
Obviously, some creative thinking and originality did go into this, so I can't help but question; why not create a series focusing on one of the original characters created instead? Heck, I would have much more easily embraced a show starring the Bear family, rather than anything revolving around Cleveland Brown. At the very least, it's an original idea, and doesn't feel quite as much like a cheap knock-off.