Hi,
The main document to be followed for doing this type of an installation is Enterprise Governance Risk and Compliance (EGRC) Product Information (Doc ID 1084596.1)
In the last project, we installed GRC , PCG and PEA.
Take a look at the blog post in the following link:
http://ermanarslan.blogspot.com.tr/2017/04/grc-grc-ebs-implementation-errors-and.html