In the Dragonball series the afterlife and God's are mentioned alot and appear in the series too. This section explains the Gods and what they control.
Dai-Kaio-Shin is the ruler of everything and is the highest God, then there are the four
Kaio-Shins they control a section of the galaxy North, South, East and West, in each galaxy
there are four Dai-Kaios that control a solar system, in each solar system there are
four Kaios who control a section of the solar system. Also there is Emma-Daio the God who
judges peoples souls at the city of Hades, and Rou Kaio-Shin. Also every planet has a God
who protects it called Kami.
Unfortunatly not many of the God's exist anymore as all but the Dai-Kaio-Shin and the East sectors Gods were destroyed or absorbed by Buu when he went on a rampage destroying all of the North, South and West sections of the galaxy way before the time of Dragon Ball.
Here is a table of all the God's that were originaly alive.