The answer is "Yes, it is in development" by one of our contributors: https://github.com/PsychoLlama/gun-rtc . But you'll realistically have to wait (or help) with it, before it is usable.

As you know though, WebRTC unfortunately requires some initial servers (STUN/ICE, or a signaling server, etc.) so it is not fool-proof P2P sadly.