Flotato creates a browser window just for Gmail. It's actually Safari, but without any unnecessary features
Look for Gmail in Flotato's app overview
Once you've found it, simply click the Get button. The button now changes to Open. Click that button to open Gmail.
That's it! You can now safely log in with your own Gmail account, and begin reading email, sending email, chatting on Hangouts, using the built-in calendar, tasks, Keep notes, virtually all the features you already know and use from Gmail.