I did try the GV2 on SP3 before and it didnt work. Even tried setting up GV1 on SP2 and GV2 on SP3 with nothing on SP1. No cigar on any of those either.
I do notice that my firmware version is showing as Build 5859EX. I'm thinking there is a problem with that build as everything seemed to work fine on the Build 5757EX that I had previously.
For the last 2 days I have had only my GV2 line setup on SP1 since this is my more important line to be working. I just re-added GV1 on SP2 and it did start out as "Registration Not Required" and after several minutes changed to "Connection to 64.9.241.108" (obviously Google's IP) but SP2 never moves to "Connected". Actually, SP2-SP4 when defined never move to "Connected" even though SP1 always connects just fine regardless of whether I have GV1 or GV2 defined on SP1.