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.