http://cs.i2p/nix
Everything through the Gateway goes through Tor, and the Gateway is bound to your main network adapter, which if on a VPN, will do VPN -> Tor, not Tor -> VPN. Tor -> VPN -> Internet (VPN on the Gateway VM) According to whonix.org/wiki/Tunnels/Connecting_to_Tor_before_a_VPN this is unsupported, unless using Qubes and a separate Gateway VM.