YOU SAID:

Gavin is not a good person when it comes to being nice

INTO JAPANESE

それは素敵なことになるとギャビンは良い人ではないです。

BACK INTO ENGLISH

And it would be nice that Gavin is not good people.

INTO JAPANESE

ギャビンが良い人はいいでしょう。

BACK INTO ENGLISH

Gavin is a good person?

INTO JAPANESE

ギャビンは、いい人ですか。

BACK INTO ENGLISH

Gavin is a nice person?

INTO JAPANESE

ギャビンは、いい人なんですか。

BACK INTO ENGLISH

Gavin is a nice person?