Ga: R2 U R' U R' U' R U' R2 U' D (R' U R) D'
Gb: the inverse of above, but dont do the D at the start, do it at the end
for both Ga and Gb you could do D move first, which i do
V: R' U R' U' R D' R' D R' U D' (R2 U' R2) D R2
typed these without a cube, lmk if any are wrong