$ sudo apt-get remove gptsync 

Uninstall gptsync including dependent package

If you would like to remove gptsync and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove gptsync 

Use Purging gptsync

If you use with purge options to gptsync package all the configuration and dependent packages will be removed.

$ sudo apt-get purge gptsync 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove gptsync 

See Also,