yes
As stated, Jim is Greg; it follows from each statement that all three people are in fact Greg.
Try SparkNotes.com. It might be for Shakespears plays specifically, but if that's what you're looking for, they have the modern and old translation of his plays. However, they might have other plays as well.
It was the theatre which Shakespeare had his plays performed and it was very popular!
38 and old fashioned format
Vincent Martella who plays Greg in Everybody Hates Chris is 18 years old (born October 15, 1992).
Greg Jennings is 28 years old!
Greg Pateryn plays defense for the Montreal Canadiens.
Greg Smith plays for the Chicago Bulls.
Greg Toler plays Cornerback for the Indianapolis Colts.
Greg McElroy plays for the Cincinnati Bengals.
Greg Hardin plays for the Denver Broncos.
Greg Wilson plays for the Denver Broncos.
Greg Latta plays for the Denver Broncos.
Greg Moore plays for the Indianapolis Colts.
Greg Childs plays for the Minnesota Vikings.
Greg Jennings plays for the Minnesota Vikings.