Hi, and thank you for your question. My name is ***** ***** I'll be assisting you today.
You will need to use the Mail app on the iPhone (at the bottom) to send and receive emails correctly from now on.
To set up your Gmail account with the Mail app, please open up the Settings app first, and then scroll down and tap "Email, Contacts, Calendars".
Next, tap Add account > Gmail, and then add your Gmail account info at the next screen. Tap Next > Done when finished.
Finally, tap on the Mail app at the bottom of your iPhone; you will able to see your Gmail emails there, and can compose and send an email using the Write icon at the top-right.
Do keep me posted on the results. If you need more help, please use the Reply box below to continue our conversation.
Otherwise, kindly take a moment to rate my service by clicking on (and submit) one of the five stars at the top of this page - this is the only way that I'll be credited for assisting you today. Thank you.