Using Global Entry card in NEXUS lane Canada to US

So says the official page:

Global Entry Members at NEXUS/SENTRI Lanes

There are no additional requirements for a member to use the NEXUS lanes coming into the U.S. However, Global Entry cards are not valid for entry into Canada via the NEXUS lanes and kiosks; travelers must apply separately for NEXUS.

Another page:

Travelling with non-NEXUS members: If you are travelling into Canada or the United States (U.S.) with non-NEXUS members, you must use the regular lanes. The driver is responsible for ensuring that all travellers in the vehicle are NEXUS members. If there is a non-NEXUS member in the vehicle, regardless of his/her age, it will result in the loss of the driver's NEXUS membership

So if you attempt this with kids without GE cards, you will be in deep trouble.

Coming from Vancouver into Washington state, there was nothing to indicate Global Entry would suffice for the Nexus lane. Not knowing, we didn't mention GE, and were directed to "inspection", even though we had nothing to declare. We were made to wait, wait, wait, while BP agents did absolutely nothing, and finally were called and threatened with $5K fines per person for using Nexus lanes. Just a little indication that GE was sufficient for re-entering the US, would have saved a lot of frustration.