How do I sign out of Gmail on my Android?

Android allows for two accounts to be on the phone. I want to keep my personal acct but the other needs to be changed to my work email. I have tried everything from clearing data, the cache, and disabling the app, then rebooting the phone, but my info is there always when I enable…. HELP! At this point I don’t mind removing the app from the phone but it wont let me… Uggg!