- Has traveled to 28 countries and all 50 states.
- Is the fourth of five sons.
- His father, a former Lt. Colonel in the U.S. Air Force, died of cancer when Greg was only fourteen.
- Wrote a screen adaptation of Beowulf (2007) for his college senior honors thesis.
- Rewrote a script based on an idea by Steven Spielberg called "How I Spent My Summer Vacation".
- Chosen by Jonathan Lethem, author and MacArthur fellow, to adapt and direct the novel "You Don't Love Me Yet".
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