Follow this blog:
(AWS Compute Blog) Deploying a 4x4K, GPU-backed Linux desktop instance on AWS https://aws.amazon.com/blogs/compute/deploying-4k-gpu-backed-linux-desktop-instance-on-aws/
note: check for newer versions of the NVIDIA Grid drivers than what is in the blog.
Tips: Don't worry, installing CentOS 7 minimal will not have an additional cost in AWS (https://aws.amazon.com/marketplace/pp/B00O7WM7QW?qid=1528131387105&sr=0-1&ref_=srh_res_product_title#pdp-pricing)