I'm very confuse with the difference of GNUpgp, GNUpg and GPG~!?!?!?!

Wiki just showing GNUpg but not GNUpgp or GPG~~ are they the same or different?

Google even suggestion my string to be 'GNUPG', when i tried to search the word of 'GNUPGP'~~

I'm looking for info regard to GNUpgp~ does it exist? does it just mean of GNU liciense of PGP~?
Anything related to pgpi?

Sorry by asking those stupid question~~ hope some1 could help me to differenciate and provide more info regarding on GNUpgp~

Many thanks~

Good day~