4x4Labs. I took a flyer and emailed Luke the day after Christmas since I'm not enamored with current offerings, he said they're already working on it and he's promised pix any day now. He's also planning on doing a front bumper, sliders, and skids - he acknowledged the GX is gaining in popularity and sees the market opportunity.
I had a 4x4Labs bumper on my 80 and it was the best upgrade I did (since it was already triple-locked). Max clearance and protection. Yes it requires cutting out the rear crossmember (which will freak some people out), but the bumper adds a new crossmember and due to that is able to really be tucked up, whereas others have to work around/protrude past the crossmember. Neither I, the other locals who did 4x4Labs (we did a group buy and built them ourselves), nor anyone I know of has had an issue after cutting out the crossmember.
Luke advised if you look at the 4th gen 4R rear bumper he sells, you'll have a good idea of what the GX bumper will look like. The GX bumper will also be modular, allowing for different configurations. And if I understood him correctly, the GX front bumper will resemble the 80 series front he sells.