I am a Senior Software Engineer and I have a few years of experience with Google Cloud Platform in large scale projects.
I attended a 1 week training about Google Cloud Platform (which includes GAE) at Google's office in Tel Aviv.
Golang is not my main language, but I used for implementing some simple server applications, so I think I know it well enough to do a good job on this task.
Working as a Team Leader and Architect in my previous position, I have plenty of experience with writing clear and well structured documentation.