I would suspect a forward gate would be something like this (sudo code):
give legs lay out of:
3 6
2 5
1 4
raise legs 1, 3, 5
move legs 1, 3, 5 "forward" & legs 2, 4, 6 "backwards"
lower legs 1, 3, 5
raise legs 2, 4, 6
move legs 1, 3, 5 "backwards" & legs 2, 4, 6 "forward"
lower legs 2, 4, 6
repeat