So I spoke to SX today regarding the two new pairs, and they made me aware that to pair a non-standard ticker to BBP as a base is not as "easy" as we assume.  (A standard pair would be something like ETH->BBP or BTC->BBP, but XMR->BBP is a non-standard base).

So to qualify as a base pair, the other ticker (GRC or XMR) has to meet certain guidelines.  Unfortunately neither meet the guidelines at this time.

So the status is:
GRC->BBP is not possible at this time
XMR->BBP may be possible soon

I asked them to keep us notified as soon as XMR->BBP might be possible and explained why, since we will be liquidating a lot of XMR in the future with our new mining rewards plan and orphan liquidation plan (in XMR).

GRC is not possible I assume because of the low volume (to be a base pair).
XMR is close, but they don't consider it a base yet.