Has anyone used a Radeon Pro card with Sketchup ?
This Sketchup Forum concerning hardware is two years old but it mentions the AMD FirePro Professional cards for using the software: Hardware Purchasing Advice For SketchUp & LayOut [wiki] - SketchUp - SketchUp Community
Maybe you should also post your question at SketchUP Forum and see if any users have experience using the software on AMD GPU cards. SketchUp Community
From AMD Support concerning Professional GPU card compatible with Sketchup: Radeon Pro Software Certified ISV Applications | AMD