No, I didn't print them all at once, this is a reunion photo. I tried to print them in groups of 2 or 3 to save setup and print time, but I found that as the extruder jumped from one die to another the filament sagged out of the nozzle and left a little "worm" on the next die. Although I experimented with retraction, coast and wipe settings, the wood filament is just more prone to this side effect. So I reprinted the last few as singletons and they came out much cleaner.
Another issue is that the faces on the bed come out glassy-smooth. I sanded them in a single direction to give them some "grain" for the stain to penetrate. The 10 and the 1 above came out pretty well. I should have sanded his 1-2-4 face more deeply - it came out more smooth and yellow than all the rest.
At first I tried to use some GP3D wood filament I have on hand that is a bit lighter in color. But I could not get it to stick to the bed, even though I was using the wonderful Magigoo coating. I was trying to print one of the smaller dice, and it was just not enough surface area to stick to the glass. I gave up on that pretty quickly and switched to the Hatchbox. This is the second project in which I've given up on the GP3D - see my trophy base project. I don't think I'll try it again.
Evil thought: (only after it was all done) I've been using Simplify3D software for the last 7 months. One of its features is the ability to print different levels of a model with different settings. I printed this with 20% infill. But it would be very easy to print the lower layers with a much denser infill, which would essentially make them "loaded" dice. The bottom face would be much much heavier, making it slightly more likely to land on the bottom, and making the opposite face more likely to come up. So... if you're playing D&D or any other dice game with 3D-printed dice, watch out!