The 42-year-old singer and 'X Factor' judge's trip is due to take place before the end of November this year, reported Daily Star.
The singer, who was given an Order Of British Empire (OBE) for his charity work last year by the Queen, will visit the war zone during a break from 'X Factor' filming.
"Although The X Factor is a big commitment, Gary has some free time between now and the live shows," a source said.
Cameras will follow Barlow's visit and his trip will be shown during an hour-long documentary.