To open an account at GFF Futures, simply follow the account opening link and instructions here (hint, most people will be applying for an "Individual Account").
For any help during your Broker account opening process, you can email NewAccounts@gffbrokers.com.
Once your account is opened and funded, send an email request to NewAccounts@gffbrokers.com to have the White Shark trading activated on your account along with which data feeds you want to trade. After you've made the request you will receive an encrypted email with your username and password.
Congratulations, you can now access and trade your GFF account through White Shark with your new credentials through the sign-in.