There is a two-week delay before gsutil gets updated with the latest and greatest. If you want to try the new stuff out, pip install the SDK!
sudo yum install gcc openssl-devel python-devel python-setuptools libffi-devel sudo yum install python-pip sudo pip install -U gsutil
Then execute gsutil like this:
To access beta (or even alpha) features of gcloud, execute gcloud like this:
gcloud beta compute instances ...