They’re synthetic so I’m guessing no. Good question though

Unlikely the swarms have any effect, but we saw one platform overloaded by the husk electrical discharge.

We get two theories as to how the seeker swarms work at the start of the game: nerve toxin or stasis field. I think the second is more likely given that we see people freeze in misstep and not fall over; something must be holding them up. With that in mind, I think the geth could be affected. The bigger question is whether the seeker swarms could actually see them, given that they also couldn't see a quarian.

If the swarms use something similar to the biotic ability stasis. Then maybe they can work on geth. If it's some kind of paralytic like Mordin's neural shock. It won't work on a synthetic.