Gatekeeper Public Key Authority (GPKA)
A Commonwealth authority responsible for supervising Commonwealth government PKI, developing PKI standards, assisting agencies in PKI implementation, liasing with industry bodies and PKI vendors and overseeing Gatekeeper accreditation.

gTLD (generic Top-Level Domain)
A general-purpose domain name on the internet. In 1997, seven new gTLDs were created: .firm, .store, .web, .arts, .rec, .info and .nom. It was suggested the international TLDs (ie .com, .net and .org) be redefined as gTLDs. Example: Code9 Shopping Cart Software uses ".com"