This deal will allow you to transfer your domain name to Wordpress.com from Google Domains and receive a free transfer plus an additional year of registration on any gTLD's. WordPress.com has no requirements to use the WordPress managed hosting.
You can just register your domain names there and delegate your name servers elsewhere like you would it any other registrar they also offer and include WHOIS Privacy and DNS hosting as well as email in URL forwarding with HTTPS support.
Once you've started the transfer, you can approve the outbound transfer immediately with Google, which will allow the transfer to complete within 20 minutes to WordPress.com, allowing you to skip the mandatory 5 to 7 day waiting period. You can see the process outlined in the WordPress.com transfer guide here
The only restriction on the deal is the domain names needed to be registered before 1 July 2023 essentially, before the acquisition of Google Domains was announced by Squarespace. When doing a WHOIS Lookup the domain name will need to be showing as "Squarespace II" for the registrar of record to be eligible.
gTLD's are governed by ICANN policies, So the domain name on transfer will need to stay with WordPress.com for the first 60 days, but can be transferred out immediately afterwards to another registrar for their transfer fee which will add another additional your registration gTLD's can have up to a maximum of 10 years of registration.
You may want to consider taking advantage of Google's pricing error in Turkish lira for renewals first and seeing if this offer is available after the 60 days has elapsed still.
Original offer posted here, but I have expanded on it above.
Update: Offer Still Valid as of 15th of May 2024.
thanks for the cool posts. any way to get gsuite w custom domain and 3 email addys cheaper? currently paying around 60 pcm