The toggle latch as set-up in the attached image. Power from the right 'in' side does not toggle the switch. The leading redstone path on the gate lights up when the conduit next to it sends redstone but nothing happens to the gate. Right clicking the gate switches perfectly fine. flipping the gate 180 degrees has the same effect.
Version: ProjectRed-1.7.10-4.7.0pre12.95

Nope. Works fine. Gates don't connect to conduits. Thats like trying to connect framed wires to gates. Not gonna work.

I assume that they are simply incompatible
And since I don't know how difficult it would be to make them compatible and the dev has a lot of bugs and implementations to take care of I would suggest using the wires provided by the mod(or ask the dev of the other mod)

Sorry for the late reply, i did just try it with the Red Alloy Wire on both 'IN' side, still doesn't toggle the latch.