I'm going to say "No". But having been prompted to look up the series from your op. It seems like a decent series. Not too big, not too small.

How does this series fit in Asian motorsport? Is there a rivalry with Super GT of some kind?

As someone who is selfish and like to see the WEC here. This series would be a good compromise. Should be called Asia-Pacific LM Series, and have a race here. Preferably at Phillip Island.