"The majority of deaths caused by guns are gang related."
That isn't true. It's true that the majority of gang-related homicides are (unsurprisingly) caused by guns. But the majority of gun deaths are suicides.
"There were 1,824 gang-related killings in 2011. This total includes deaths by means other than a gun. The Bureau of Justice Statistics finds this number to be even lower, identifying a little more than 1,000 gang-related homicides in 2008. In comparison, there were 11,101 homicides and 19,766 suicides committed with firearms in 2011."
Even if those 1,800 gang-related deaths (and remember--not all of them were by gun) are included in the 11,101 total of homicides, it's still a small percentage.
HuffPo article