Wait -- found it.
Yes, the new G30s DO work in both modes. The old ones do not. Here's the thread on how to change the new ones.
A couple of notes:
When you first turn it on, the transmitter flashes its blue LED --- once for RF1, twice for RF2.
When you change modes, the transmitter again flashes at you --- once for RF1, twice for RF2.
The first time I did the change, my transmitter flashed both lights at me continuously, even after I turned the unit off and on again. To resolve that, I removed the batteries, restarted, and reset the RF mode.
And that's what I learned through the magic of Search.
:)
Joe