Recently had a family member commit suicide by shooting himself in the temple. was death quick and painless?

So sorry for the: trauma you and your family are going through. Almost certainly it was a quick and painless death. If you need a little emotional support consider a few sessions w/a grief counselor. Peace and good health.

Depends: Depends on the gun used, where the bullet went, and other factors. The real question here is how are YOU doing? The family member is no longer here, but you are. Might you consider psychotherapy to discuss feelings of loss and mourning?