Default Is this for the new 4.4 Bootloader?

Is this ROM supported on the new 4.4 bootloader? I have a T-mo GN3 that I updated to 4.4.2 through Kies. How do I check what bootloader version I have (I saw somewhere *#1234#, but that didnt give me anything) and how do I know if this ROM is supported?

Also in the Genzolo folder, it only says hlte nightly. It doesnt list a Tmo specific nightly (hltetmo). Is it alright to flash this ROM? I am assuming yes, because I find this thread in the Tmo GN3 forum.