Subscribe to the Green Building Studio Site. Download the plug-in and the tutorial:
http://www.greenbuildingstudio.com/
Install the add-on as per instructions. Follw the instructions some more for info on creating a project in GBS and referencing your ArchiCAD model to it.
The weather database is set up for the US only, so you'll need to select a location whose ZIP code you know (try Chicago 60609).
After submitting a project for a very prliminary energy analysis. you have the further option to create a gbXML file from the GBS web site.
I've tried this (twice - I'm no expert) and have imported the gbXML into another application - in my case IES <VE>
Think Like a Spec Writer
AC4.55 through 27 / USA AC27-6000 USA
Rhino 8 Mac
MacOS 14.6.1