[Basicz]

Also I think you can do a simpler way on this

pawn Code:

if(IsPlayerInRangeOfPoint(playerid,10,xxx,yyy,zzz)//Gate 1
{
    switch(Open{0})//Check whether the gate opened or closed
    {
        case true://If the gate opened
        {
            MoveObject(Gate[0],Float:X,Float:Y,Float:Z,Float:Speed);//Close the gate
            Open{0} == false;//false for closed
        }
        case false://If the gate closed
        {
            MoveObject(Gate[0],Float:X,Float:Y,Float:Z,Float:Speed);//Open the gate
            Open{0} == true;//true for opened
        }
    }
}

To

pawn Code:

if ( IsPlayerInRangeOfPoint( playerid, posRange, whereX, whereY, whereZ  ) )
{
    Open{ 0 } = ! Open{ 0 }; // Sets Open variable to the opposite side as it's current side ( false = true, true = false ).

    // Why { } ? Because we are using CHAR-ARRAYS, which is limited to ' 255 '.
    
            
    switch ( Open{ 0 } ) // Switch depends what is the current state.
    {
        case true : // Gate should be opened
            MoveObject( Gate[ 0 ], openX, openY, openZ, moveSpeed ); // Gate[ 0 ] = the object

        default : // Else, gate should be closed
            MoveObject( Gate[ 0 ], closeX, closeY, closeZ, moveSpeed ); // Gate[ 0 ] = the object
    }
}

No idea why you are not using char-arrays to the ' Gate ' variable, when you used ' OnGate ' variable to an char-array ( 8bits ) to the size of gate positions.

Plus, char arrays need to use { } not [ ]

pawn Code:

new OnGate[MAX_PLAYERS char];
OnGate[playerid] = a; // Wrong
MoveObject(Gate[OnGate[playerid]], ... ) // Wrong