[Kostas']

First, use [pawn] for the script.
At the top

pawn Code:

new GOTOPLAYER;

And at the

pawn Code:

public OnPlayerCommandText(playerid, cmdtext[])
{
    if(!strcmp(cmdtext, "/race", true)) {
        new Float:x,Float:y,Float:z;
        GetPlayerPos(GOTOPLAYER,x,y,z);
        if (GetPlayerState(playerid)==PLAYER_STATE_DRIVER)SetVehiclePos(GetPlayerVehicleID(playerid),x,y,z);
        else SetPlayerPos(playerid,x,y,z);
        ResetPlayerWeapons(playerid);
        return 1;
    }
//More

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EDIT:
Here is your mistake

Quote:

Originally Posted by noder51 pawn Code: new Float:2057.3955, Float:861.6058, Float:6.7143,181; GetPlayerPos(GOTOPLAYER, x, y, z);

You need to have them

pawn Code:

new Float:x, Float:y, Float:z;

And here your coordinates

pawn Code:

GetPlayerPos(GOTOPLAYER, 2057.3955, 861.6058, 6.7143,181);