<form action="fullridez.php">
    <h4 id="Filter">GPA</h4>
    <input id="FilterBox" name="gpa" type="text"/>
    <h4 id="Filter">Amount</h4>
    <input id="FilterBox" name="amount" type="text"/>
    <h4 id="Filter">School</h4>
    <input id="FilterBox" name="school" type="text"/>
    <button  type="submit" id="FilterBox" onkeypress="checkEnter()" >
        <img src="search.png" width=15 height=15 />
    </button>
</form>
<script>
</script>

<?php
$servername = "MariaDB";
$username = "root@localhost";
$password = ;
$database = "scholarshipslist";

$gpa = $_GET["gpa"];
$amount = $_GET["amount"];
$school = $_GET["school"];
// Create connection
$conn = new mysqli($servername, $username, $password, $database);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";

$count = "SELECT 'id', 'school', 'gpa', 'amount'  FROM 'scholarships'";
$result = $conn->query($count);

if ($result->num_rows > 0) {
    // output data of each row

    $sql = "SELECT * FROM 'scholarships' WHERE 'gpa' <= '".$gpa."'
    'amount' <= '".$amount." 'school' == '" .$school."'";

    if (mysqli_query($conn, $sql)); {

    }
    echo $result;
} else {
    echo "0 results";
}
$conn->close();

<table>
    <tr><td>Col 1</td><td>Col 2</td><td>Col 3</td></tr>
    <?php
        while($row = mysql_fetch_assoc($result))
        {
            echo "<tr><td>"
                . $row['col_1'] . "</td><td>"
                . $row['col_2'] . "</td><td>"
                . $row['col_3'] . "</td></tr>";
        }
    ?>
</table>

<?php
            $num_rows = mysql_num_rows($result);
            for ($i=0;$i<$num_rows;$i++) { //loop through all rows of data
            $row = mysql_fetch_assoc($result); // your data is now:  $row['fieldName']


            ?>
            <div>
            GPA <input name="" value="<?php echo($row['gpa'])?>;" type="text">
            AMOUNT <input name="" value="<?php echo($row['amount'])?>;"  type="text">
            SCHOOL <input name="" value="<?php echo($row['school'])?>;"  type="text">
            </div>
            <?php
                        } //end of the loop
            ?>