Hey there alezon16,
Thanks for reaching out to the Apple Support Communities. We understand you're wanting to use your Gmail email as your Apple ID, and we'd be happy to get you pointed in the right direction.
To get started, are you going through the steps listed in the following resource when you set up your Apple ID: How to create a new Apple ID - Apple Support
If so, are you getting an error when setting up your Apple ID, or after you complete the process are you not receiving the verification email sent to your Gmail account?
Be sure to check all your folders when checking for the email, including the Junk folder just in case.
Keep us updated on the results.
Take care.