The instalation of Google Cloud SDK went right. The problem is when I try to execute a gcloud command (even if gcloud -h) I have this output:
\\Google\\Cl
As John Hanley said, my version was broken on Windows. Google has fixed the problem with the version 2.74.0.1. Thank you all !
There is already a bug for issues when updating to Cloud SDK version 274.0.0 in Windows. Please check it. As a workaround installing Python in C:\Python27
and then Cloud SDK in C:\Cloud_SDK
could help.
I suggest to migrate to Python 3 as Python 2 will not be maintained past 2020. Here is more info about it.