[mansonh]

Where do you set the players gang?
Here i only see gang definitions.

What is SetPlayerToTeamColor?

You obviously need some sort of gang id for each gang, instead of just definitions.
So if you have

enum{
AZTECA,
VAGOS,
BALLA,
...
}

Then you can use either an array.
new GangColours[] =
{
0x33FFFF80, 0xF5BE1880,...
}

then set their colour using, ex GangColours[AZTECA];