Can a unlocked Galaxy s7 Edge work with Boost mobile?

[AC Question]

So I have recently been wanting to buy the Galaxy s7 Edge unlocked from boost mobile or amazon and my service is boost mobile but i know unlocked phones are only compatible with GSM networks like AT&T. Boost mobile is not a GSM network. The owner who works at the boost mobile store where i go to pay the bill says i can buy the phone and he can put the phone to work with boost. Is is possible for the unlocked phone to work with boost mobile or is the man lying?