Gmail -> ProtonMail free tier Google Maps -> Open Street Maps (although I personally use Ordnance Survey Maps) Google Docs -> I use LibreOffice because I don’t need the cloud functionality Google Calendar -> I currently use a Synology NAS to host my own but I’m eagerly awaiting the release of Proton Calendar

As a disclaimer to this I actually pay for ProtonMail and OSMaps because they’re products I use daily and feel that they deserve the money, however they do have free tiers and there are free alternatives to most Google software. I’d strongly suggest looking into de-Googling, there’s an entire subreddit dedicated to it.