It's been out for a few days, but in case you haven't seen it, I've finally updated my addon for Blender, which allows you to output 3D models to GameMaker Studio 2. The latest iteration of the addon will output models to GameMaker's vertex buffer format, so you can load the files natively, without including a bunch of scripts in the game.

You can read more about the addon here: https://martincrownover.com/blender-addon-gm-vertex-buffers/

Or you can go straight to the Github page, here: https://github.com/massivecatapult/gamemaker-3d-io