Gmail accounts do not get deleted but they can be disabled
Nope. If you have a gmail account you'll have one forever. There are ways to delete it but Google doesn't make it easy (like Facebook) and you'll only be adding more to the data pool.
Wait, I take that back. Apparently there is a procedure. I just wouldn't trust Google to actually respect it.
1-Click the gear icon in the upper-right corner of Gmail, then Mail settings, and open the Accounts and Import tab.
2-Click Other Google Account settings in the "Change account settings" section.
3-Click Edit in the "My products" section.
4-Click Remove Gmail permanently.