aloha poh...
There is no word "gigal" in my concordance but there is the word "Gilgal" which is identified as the name of three places in Palestine, and probably is the word you're looking for/at. It means "wheel".
Maybe there's a tie-in with the visions that Ezekiel had. Or maybe it has some sort of Bhuddist connection since Bhuddists revere the wheel, even to use it when focusing meditation while chanting and praying.
Nice to hear from you, and mahalo back at 'ya.
flow....