[Zeex]

pawn Код:

new te[256];
  format(te, sizeof(te),"(id:%d): %s", playerid, text);
  SendPlayerMessageToAll(playerid, te);
return 0;

That code you have send message to all players anyway, doesn't matter whether they are gang members or not.

Try this:

pawn Код:

public OnPlayerText(playerid, text[])
{  
  new message[128]; 
  
  if (text[0] == '!' && playerGang[playerid] > 0)
  {
     new playername[MAX_PLAYER_NAME];
     GetPlayerName(playerid, playername, MAX_PLAYER_NAME);

     strdel(text, 0, 1);
     format(message, sizeof(message),"Gang Chat: %s: %s", playername, text);
     
     for(new i = 0; i < gangInfo[playerGang[playerid]][1]; i++)
     {
        SendClientMessage(gangMembers[playerGang[playerid]], ROZOWY, message);
     }
  }
  else
  {
     format(message, sizeof(message)," (id:%d): %s", playerid, text);
     SendPlayerMessageToAll(playerid, message);
  }
  return 0;
}

Also you need read this topic.