Okay, I tried the other server you provided, with the server port set to 25740 + the query port set to 25740, && the server port set to 25740 + the query port set to zero. Got 0/0 players both times.
The script results:
Array ( [mc] => Array ( [gq_online] => [gq_address] => 18.104.22.168...
query.port was set to each of these values: 9003, 25565, 25567, 8557 for testing. I also set the query port option to zero for a test in the server options. All of them gave me the same error.
ErrorException: fwrite() [<a href='function.fwrite'>function.fwrite</a>]: send of 7 bytes failed with errno=1 Operation not permitted - library/GameServers/GameQ/GameQ.php:524
I don't think it is my host, either. I opened it up with support and they said it was an issue with the plugin.