How do I sync iphone 5S SE contacts and Calender with google

Greetings Help Bilbo, 

Here are the steps to set up mail, contacts and calendar accounts on an iPhone. 

Set up mail, contacts, and calendar accounts on iPhone 

Set up a contacts account

1. Go to Settings > Contacts > Accounts > Add Account.

2. Do one of the following:

• Tap a service—for example, iCloud or Microsoft Exchange—then enter your account information.

• Tap Other, tap Add LDAP Account or Add CardDAV Account (if your organization supports it), then enter the server and account information.

For more help, see Use other contact accounts on iPhone.

Set up a calendar account

1. Go to Settings > Calendar > Accounts > Add Account.

2. Do one of the following:

• Choose a service: Tap a service—for example, iCloud or Microsoft Exchange—then enter your account information.

• Add a calendar account: Tap Other, tap Add CalDAV Account, then enter your server and account information.

• Subscribe to iCal (.ics) calendars: Tap Other, tap Add Subscribed Calendar, then enter the URL of the .ics file to subscribe to; or import an .ics file from Mail.

For more help, see Set up multiple calendars on iPhone.

Thanks.