Test-drive the GATK tools and Best Practices pipelines on Terra
Check out this blog post to learn how you can get started with GATK and try out the pipelines in preconfigured workspaces (with a user-friendly interface!) without having to install anything.
Example commands in SelectVariants Tool Doc
In the example "Set filtered genotypes to no-call (./.):" in;
The argument for setting flagged GT to null is a typo.
The example has it as