Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Calculation/Engineering.php
public static function GESTEP($number, $step = 0)
    {
        $number = Functions::flattenSingleValue($number);
        $step = Functions::flattenSingleValue($step);

        return (int) ($number >= $step);
    }
public static function GESTEP($number, $step = 0)
    {
        $number = Functions::flattenSingleValue($number);
        $step = Functions::flattenSingleValue($step);

        return (int) ($number >= $step);
    }
GESTEP.

Excel Function:
GESTEP(number[,step])

Returns 1 if number >= step; returns 0 (zero) otherwise
Use this function to filter a set of values. For example, by summing several GESTEP
functions you calculate the count of values that exceed a threshold.

@param float $number the value to test against step
@param float $step The threshold value.
If you omit a value for step, GESTEP uses zero.

@return int