Now that you have actually planted them in the ground. I would not remove them again...you have your plants in flower already, that is why they are producing pistils and flowering; If you move them back inside now, you are going to shock the Crap out of them on 2 levels.

1st, they are flowering. If you revert to veg now, the photoperiod change will most likely cause hermie's, and the stress, caused by reversing the photoperiod will delay productivity due to the fact that the plant is going, "am I in flower, or veg, or what?"
2nd. the shock of uprooting them and moving them back inside...I don't think so. If you get a nice finish at that point, you'd be extremely lucky...Maybe an expert grower could do it, and ....nawww.Bad idea! So;

You should grow them out and finish them right there where they are...they are just going to be smaller, but that does not diminish the quality...

and, the Quality is what you want in the end. another thing...they will finish faster, because the length of veg' time is directly proportional to how long it takes plant to fully mature. shorter veg=less weeks in flower...peace.

Hope this helps...Next time let nature take it's course...You are not supposed to know the sex yet...If you want to do that. Take a clone.

lw