I think @eric may be referring to this post:
The old ones were reusable by replacing the battery but I don’t thing any of them have been even vaguely recyclable. Reuse is much better than recycling but the work to do it in this case is extreme; remove the plastic coating (very carefully), expose the battery and replace it.
An LED light bulb contains about the same amount of electronics and much, much more recyclable componentry (it’s got a significant, though very very small, amount of copper inside.) A few places can, supposedly, recycle them though where I live recycling of anything has pretty much stopped over the last three or four years - it’s way to expensive.
Recycling the G6 transmitter is really only a theoretical possibility. Unlike more traditionally recyclable things it is wrapped up in hard plastic and even then it contains very small amounts of useful stuff; just the very small lithium metal cell that powers it. The G7 is even worse because, along with not being reusable or recyclable, it’s medical waste.
The best approach is to incinerate it; this is what most countries which have the money but not the landfill do.