[(ETR)Geto244]

You put that in your Gm and than you use in your code where you need to create checkpoint forall

pawn Код:

SetCheckpointForAll(Float:x, Float:y, Float:z, Float:size)
{
    for(new i=0; i<MAX_PLAYERS; i++)
    {
        if(IsPlayerConnected(i)) 
         {
              SetPlayerCheckpoint(i , Float:x,  Float:y, Float:z, Float:size);
         }
    }
}

In your code you put SetCheckpointForAll(pos x, pos y, pos z, size of checkpoint)

Example:
CMD:race(playerid, params[])
{
SetCheckpointForAll(284.34, 1322.32, 472.90, 3.0);
return 1;
}