I know this is only supported in Poser, but would would happen if you opened it in DAZ? Would it work at all? This is perfect for a project I'm working on but I stopped using Poser and went fully DAZ Studio some years ago.

Actually not , Movements will break in DS for sure and give you bad results. It is because Daz Locked Simple bones single skin in the App preventing creators to Import articulated Figures from external 3D programs . A simple marketing strategy to reserve there Genesis series and force creators to work on these. The negative side effect is that there are just very few standalone figures released for DS as it is restricting the workflow when Import is restricted.

I assume that it is this way to prevent that allot of creators pop up on other places making new Improved models for DS not selling at DAZ , also every derived model fom genesis belongs intellectually to Daz. 

The Feature is built in DS as I tested it but never found a good way to get around that Lock.

Wicked scary Summoner! TYVM!!!