Recruiter screening is quite straightforward. They just go over your resume. Interviews are tough. Especially GCA interviews. I was asked to take it second time as the first one was not satisfactory. You need to spend a lot of time. If you are not knowledgeable about the GCP, I suggest going through the certification process. One thing that helped the most is working with a coach. There are only a few coaches who focus on Google interviews. I can't emphasize enough. They will give you the perspective you cannot find anywhere else. I worked with ghire folks. They helped me with GCA, Leadership and Googliness. So pity there are no coaches for GCP role related prep.

Long process, friendly people and communicative hiring manager. The process itself was clear but the hiring result was a bit unclear for me. Not sure what more I can say about my hiring process at Google.