I haven't upgraded to the official release yet, however I have been running the GM for over a week and I have been using Fusion 7. Works just fine. I did a clean install of 10.11 GM and reinstalled Fusion then imported the VM.
I was getting some weird instability with Fusion 7 and the 10.11 betas. It mostly worked but was glitchy. I can't speak for the final release as I've already updated to Fusion 8 (Which now allows me to create VMs on my ESXi box)