- Member of a small circle of early 90s San Francisco comics, that included Patton Oswalt and Brian Posehn.
- Once lived with comedian/actor David Cross. Both comedians have, at one point, told jokes involving their former landlord, Shumul.
- Plays in a band called Black Rattle. Black Rattle appears at the end of Greg's DVD "Uncool".
- Father, with Amiira Behrendt, of two daughters, Mighty Behrendt and True Behrendt.
- August 2004 - Published a best-selling self-improvement book, with Liz Tuccillo, titled "He's Just Not That Into You: The No-Excuses Truth to Understanding Guys".
- Attended Redwood High School, located approximately 11 miles north of the Golden Gate Bridge, in the city of Larkspur, Marin County, California.
- Stand-Up Comic
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