Woops ...all in the title...Apologies!
The advice for Lightroom 6 help still states that if "using an AMD/ATI graphics card on 64-bit Windows with the AMD Catalyst 15.7 driver, and Lightroom CC/Lightroom 6 crashes or freezes during launch or when you edit an image in the Develop module. This issue can occur when using AMD Radeon HD 5xxx to 8xxx Series graphics cards running driver versions 14.501.1003, 14.502.1014, and 15.200.1062.1004. To the top Solution Install the AMD Catalyst 15.8 Beta Driver for Windows (posted on August 31, 2015). However, there is now a 16.1 driver...would this work with Lightroom 6 and Photpshop CC without problems or should I stay with 15.8 beta driver for Windows (Windows 8 .1).
That article was created when users were facing issue with old AMD graphics card drivers.
Yes, you can update to the latest 16.1 drivers and that should work fine however, you should have VRAM of 1GB or more to take advantage of GPU Processor.