def GT(gdf, left, right, dtype=bool):
    """
    Evaluate if left is greater than right

    Parameters
    ----------
    gdf : GeoDataFrame
        Input GeoDataFrame
    left : str, numeric
        Left column or value in expression
    right : TYPE
        Right column or value in expression
    dtype : dtype, optional
        dtype assigned to result Series
        The default is bool.

    Returns
    -------
    result : Series
        Pandas Series (default dtype = bool)

    """
    expression = f"{left} > {right}".lower()
    return gdf.eval(expression).astype(dtype)