Unlock AT&T iPhone 4s for use on Verizon network?

Okay so with the release of the iPhone 5 coming very soon I have decided to sell my iPhone 4s to a friend. He currently has verizon and my iphone is at&t i have been looking all over the internet for a solution to unlock my iphone for use on verizon, but every result is the opposite of what I search (i.e. CDMA (verizon) to GSM (at&t) unlock)

My question is, if i buy a GEVEY Ultra S sim will it allow my iphone 4s to be used on the verizon network? If not, what other options do i have?

please don't just say no you can't please give detail as just saying no helps no one.

Not possible. The AT&T iPhone is only configured to do GSM. You can't use it on Verizon at all. Your friend would have to use it on AT&T or another GSM network if it's unlocked, such as T-Mobile.

No way. It is not possible still. You can't access a CDMA SIM through GSM mobile. Anyway you can still unlock your AT&T iPhone 4S through remote unlocking method. This method of unlocking is safe, simple and affordable. You can get the remote unlocking for an iPhone 4S from http://www.unlocking4u.com/apple-iphone-4s/rs6wp9/ at affordable cost with easy unlocking instructions.