Not off-hand. Last time I looked into it, tagging homicide associations was a pretty messy business. I think drug related gun homicides and gang homicides two side to the same coin.
I've seen numbers on the order of 10% for intimate gun partner homicide. The percent is much higher for women, but women are a minority of gun homicide victims overall.
I looked at a variety of sources for the above numbers, but it certainly didn't seem like gang- or drug-specific associations drove the majority of non-suicide gun deaths. A decent chunk, but there are other reasons.
One surprising / not surprising other fact: ~50-75% of gun deaths involve alcohol and ~25% meth.
Of the numbers I've seen, in total gun related dealths are evenly split between suicide and homicide.
Of the homicides, ~10-50% are gang related (depending on source) and ~50% are drug-related (including overlap with gang).
F.ex. intimate partner violence being another major homicide category.