Transferring Gmail contacts to iCloud can be advantageous for several reasons, particularly if you are heavily invested in the Apple ecosystem or if you're transitioning from one platform to another. One can manually transfer Gmail contacts to iCloud with ease. iCloud has a option to import contacts in vCard file, thus you can export Gmail contacts to a vCard file and then transfer them. However, it is best to backup Gmail emails to hard drive or other storage device for security reasons.