Are you sure it has to be GP mode? It's not in the rules, and I thought everyone submitted
time attack times for RI 3-lap. (Right now, the rules still say TA mode has to be used,
but there's obviously an exception for Sonic R.) But anyway, it's all forward, not reverse.
That glitch probably will be allowed, along with any other glitches that might be used/found
(unless they're really cheap). I wonder if my outside-the-walls glitch (also RC) could be of any use.