The Monero GUI wallet refers to the ‘official’ wallet developed and maintained by the team behind Monero blockchain. It thus offers an incredibly smooth user experience given the fact that it takes into consideration the design of the XMR blockchain.
As a full node wallet, it runs the entire Monero blockchain. Though this means that initial setup takes long, it speeds up transaction times in the long run. At the same time, it means that there is no need for external servers to route user data in efforts to secure it against malware and hackers