I don't think there will ever be an extension. GM is kinda crappy with extensions - you can't even add a shader.
I am working on a program that can easily manage Modules (GMX projects inside GMX projects), called GMModular - i hope that i can find the time to complete this, then you can use that program to integrate it into other projects. So once there is an update for a project (e.g. GMHydra / GMOculus), you can also use the GMModular to update the projects that have this module included.