Robert, according to the Bible, 10th edition, the GV II's rail mount offers pan and tilt. Its a 2-axis head, not a 3-axis head. Fine, wonderful, but won't adjust as you need it to.
A possible solution is to put a Manfrotto 438 leveler between your GV II's rail mount and your tripod. B&H sells them. I have an earlier version (138) and find it invaluable. With it, I have to adjust leg lengths to level the head (what sits on the 138) only on very uneven ground.
If you don't like the 438, there are similar devices from other manufacturers.