[InfiniTy.]

No.. just put 5000 it will work or this

pawn Код:

#define INFINITY (Float:0x7F800000)

And

pawn Код:

SetPlayerHealth(playerid, INFINITY);

And also delete ,5
So it's like this :

pawn Код:

if (strcmp("/godmodez", cmdtext, true) == 0)

Command :

pawn Код:

#define INFINITY (Float:0x7F800000)
public OnPlayerCommandText(playerid, cmdtext[])
{
    if (strcmp("/godmodez", cmdtext, true) == 0)
    {
        SetPlayerArmour(playerid, INFINITY);
        SetPlayerHealth(playerid, INFINITY);
        return 1;
    }
    return 0;
}

Note : I don't know if it works with the armour too ( the infinity thing ) but you can try.