Follow the remaining prompts to install the appliance. The ASAv will now appear in your "Security Devices" list. Basic Configuration Tips

The first interface (GigabitEthernet0/0) is typically used for Management in some templates, while others treat it as a standard data interface. Check the "Configure" window in GNS3 to see the mapping.

This is the standard format for QEMU/KVM. Since GNS3 primarily uses QEMU to run virtual machines, the .qcow2 file is the most compatible and easiest to use.