Hello Zeev,
no, I don't remember anymore. Maybe I just put the acronym as a 'ref' value. Feel free to change it to an official version if there is.

(By the way, the whole Gospel Trail seems quite a dead project. I was there in March. On the spot, you can't even follow it, markings are scarce, there are no maps, no website, nothing. Here you can find an article on it:
https://www.haaretz.co.il/1.1582255 ) I tried to put it to the map but, as you can see, I couldn't even finish it.

Cheers

Gábor