Delete My Gmail Account In My iPad I wanna give away my old iPad to my kid, and would like to delete my Gmail account from the old iPad.

Questions:

1) Will my Gmail account be totally erased when I delete my Gmail account on my iPad?

2) I have thousands and thousand of contacts in my iPad which is linked to Gmail, I'm afraid if I delete the Gmail account, all contact details will be gone forever.

Thanks and looking forward to your favorable reply.
Just remove the Gmail account from the iPad by going to Settings -> Mail, Contacts, Calendars -> Select your Gmail account -> Tap the Delete Account button. 

The account will no longer be available on that iPad, but no contacts or email will be deleted from the account at Google, just from the iPad. DO NOT delete the emails and contacts themselves manually, they will be removed from the iPad when you remove the account from it.

Depending on the age of your kid and how much you want to keep him/her from getting access to your emails and contacts, it might also be enough to just disable Mail, Contacts, Calendars and/or Notes from the Gmail account screen instead of removing the entire account. If you do this, just enabling them again will put the email and contacts back on the device.