It heavily depends in your usecase but if you want to use gpg to encrypt emails and dont want to do it all in the terminal i really recommend using Thunderbird it integrates gpg very well and makes it mostly seamless.

Other than that afaik Kleopatra is the only standalone GUI for gpg simply because most of the time gpg is integrated in workflows (simply using the cli interface vor gpg libraries) and plain gpg for simple tex/file encryption/signing is just not a usecase.many people have