I have a GC that said a 3 year old ICF house had some screw pops in the drywall on the ICF walls. I am sure we have all seen nail pops on wood framing due to the expansion and contraction, but has anyone experienced this on ICFs?

Not in anything I've done since 1998. I imagine you could get nail pops in an ICF wall, but not a screw pop. We have a hot, humid climate here in coastal SC, and it hasn't happened to me.

It has been said that if there was pillowing between the webs, this could possibly happen. I have never seen it, but it possibly could.

Hugh brings up a good point. Are you sure they were 'screw pops' and not 'nail pops'?
By the 'nature of the beast', screws tend to stay tight while nails tend to loosen over time.
Expansion/contraction are not the only factors that can cause pops in drywall. I have never seen a problem with 'pops' on an ICF wall, so I suspect that there were other contributing factors at work in this situation.

I guess I assumed they were screws, I hope they did not use any nails. These were NUDURA forms and no pillowing.

They also had some drywall corners that cracked where interior wood framing meets outside ICF wall.

Brad, The cracking in the corners could be due to an improper connection of two dissimilar materials. If the contractor just "floated" the partition walls you can get cracking at the corners. If the contractor securely affixed the walls together they you may have bigger problems of settling of the whole house. The settling issue could explain your screw pops. Use either an electronic bubble level or a very accurate self leveling laser level and check the house for settling. ICF Contractor

I doubt it has anything to do with the ICF- rather, it seems to me to be more like a drywall installation error?
Here's my take- Perhaps the screws they used were of the larger "course threaded" type, and it was over cranked -thus boring a hole in the tie, (allowing it to spin freely) which resulted into a no grip situation for that particular screw...
OR -perhaps the screw was placed where there was no tie at all behind the board, which again produced a no hold situation.
I guess the question should be asked- is that the only screw? or was this happening all over the place?
That's just my opinion, Hope it helps somewhat...
Take care,
C.Kerr