How can I have my private email addresses delivered to my gmail account rather than to apple mail?

A while ago I decide to switch from using gmail to using apple mail. I also created a domain for private email addresses through apple with cloudfare. After using apple mail for some while I decided that it simply did not suit me, and I wish to switch back to using gmail. How do I go about having emails addressed to my private domain delivered to my gmail account rather than to apple mail?