$ sudo apt-get remove gpsk31 

Uninstall gpsk31 including dependent package

If you would like to remove gpsk31 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove gpsk31 

Use Purging gpsk31

If you use with purge options to gpsk31 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge gpsk31 

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 gpsk31 

See Also,