No need to download or export first and re-uplpad, just directly transfer Google Photos to iCloud online by using MultCloud
MultCloud is a free web-based tool that enables you to easily transfer, migrate, backup, sync or move files from one cloud to another and access all your online files on different clouds with a single login. Over 30 cloud services supported (both iCloud Photo and iCloud Drive are supported).
Some use scenarios:
* Transfer photos from Google Photos to iCloud Photo
* Migrate or move data between two iCloud Drives
* Backup iCloud Photos to NAS
* Sync OneDrive with Google Drive
* Transfer Google Drive to iCloud
Key Features:
* Directly transfer files from one cloud to another for free.
* File transfer in background, allowing you to close browser.
* Transfer cloud data offline without going through your computer.
* Schedule automatic data transfer between two cloud services.
* Real-time cloud-to-cloud sync.
* Convert emails to PDF and save to local or cloud drives.
Website: https://www.multcloud.com
Facebook: http://www.facebook.com/multcloud
Twitter: https://twitter.com/multcloud
Customer support: [email protected]