three very useful resources

notes: https://www.smogon.com/forums/threads/guide-to-the-gp-process-new-writers-please-read.3588923/post-7902427
standards: www.smogon.com/forums/threads/spelling-and-grammar-standards-see-post-2-for-changes-initial-discussion-points.3588427/
guide to making subjective gp changes: http://www.smogon.com/forums/threads/on-making-subjective-gp-changes.3514221/