What query protocol does GameTracker use to query minecraft servers? Is it GS4? Do i need to have that enabled or does it use MineQuery plugin?

Hello,

There is a guide here http://www.gametracker.com/games/minecraft/forum.php?thread=58741 to help you set up querying using the built in GameSpy4 protocol.

Using the built-in GS4 query, will gametracker also be able to pull the list of players on my server?

Hello,

Yes, it will. It's always recommended to run the most recent version of the server (as opposed to running a Minecraft beta server in order to use Minecraftviewer instead).

Ah. thanks!

One tiny question; how often is the minecraft server info/player list updated?

Hello,

Servers are usually scanned approximately every 1-3 minutes. It may occasionally show last scan times above that if a scan was unsuccessful and it is waiting to retry.