You cannot change it. BMR, Validation, Qualification, SOP and all the QA documents are controlled by the Head of QA, but if you want to make sure your documents are ok, you may take another person as a simple reviewer.
People who make the above mentioned documents, are responsible of their documents.
And there is no GMP Departement and no Head of GMP in a Pharma industry.
Each industry, has its Departments (QA, QC, Production) to comply with the GMP.