They are cute.
Hard to say which gender are which at that size.
Safe to assume the larger ones more likely males.
I think you need a taller divider though or remove some water.
Updates again! I bet you're all thoroughly sick of my GT's by now.
And here's my petsmart GT. Felt so bad for him in the crummy, dirty little tank I had to pick him up. Qt him for a couple weeks and now he's in with the rest of my babies. He had a couple gashes on both sides and some missing scales, torn fins, etc. But he's healed up nicely.
Updates!!! Honestly, not much has changed except their size. They're in a bigger tank now. I'm kinda scared I've got four males. They're all the same size.
you wont really know the gender untill they are older. They will seem like they comstantly change on you lol. But they are looking great. keep this up it is really cool to see young fish grow like this.