Bin/gpm no such file or directory?

Hi, I tried different bin/gpm commands (update, upgrade..), but I get this message.
I read about trying to execute 32-bit commands in 64bit environments.
My Hoster is on amd64, so is it possible gpm is 32bit???

First check to make sure your gpm script in the bin/ folder has executable permissions. It should have either 755 or 777 permissions.

Next, make sure you are running PHP 5.4+ from the CLI. Simply type php -v to confirm the version.

I changed permissions to 755...and it works.
Thank you!