I found out the answer to your question.
It's a puerto rico expression (used only there) that means something like this:
When you do something bad to someone else, probably that one will do the same to you; when you're waiting to see what's goin'on with this one, you are waiting to see if the Gas Pela...in spanish something like "dejalo a ver si el gas pela o no pela", in english "let's see if the fire burns or not". Let's see what happens.
Don't know if i've let you understand what i mean.
The origin is this: in Puerto Rico the gas for torches was sold individually and people who bought it used to bring their own cans to store it, but this kind of gas was quite strong and if it touched your skin it peeled it.
It's the better i've found out and the link to the original explanation is here:
http://answers.yahoo.com/question/in...4123416AAyIsiJ
Hope this can help you.
ciao ciao
Ita