It is very easy to setup your NameOcean DNS for G Suite also known as Gmail. If you already created a DNS Zone and pointed nameservers of your domain name to NameOcean servers, you’re ready to set up Gmail as your business email for your domain. For more information about creating DNS Zone, you can see the page: How to create a DNS Zone?
If you haven't verified your domain to use with G Suite, you can do it on NameOcean DNS Dashboard.
You can follow instructions: https://support.google.com/a/answer/183895#generic_TXT
Get your verification code as following "Get Your Verification Code" section.
When you got the verification code, you can add you verification code to your DNS Zone as a TXT record.
Open DNS section on NameOcean Dashboard: https://nameocean.net/dashboard/dns/
Click "Manage DNS Zone" to add new TXT records. Now, select TXT tab and write @ as Hostname, your verification code as Text, 1d as TTL then click Save.
You can go on to next step to complete domain verification. See "Complete Domain Verification" section on https://support.google.com/a/answer/183895#generic_TXT
Adding MX Records
Open NameOcean DNS Dashboard. Click "Manage DNS Zone" button. Select MX tab. Add following values as MX record like seen on image.
|Hostname||Priority||Mail Server Hostname||TTL|