They Look healthy..
I dont do autos so i cant really respond on the over all growth..
But they have nice color and no evidence of nute burn or deficincies
Looks good, glad you got some decent veg. Im at around 12-13 days from showing pre flowers, but I only got 17 days before it showed sex and started stretching. I'm only at 40cm this time lol. That's a 3 gallon (12") pot for reference sadly. It's touch and go with autos. Had a few that got a good 4-5 weeks, and a few that sadly took off end of week two, start of week three.
Looks fine for roughly two weeks of flower. Here's my development at day 13 of flower for comparison.
My first Indoor plant was a GG auto. I have a soft spot for them for sure.. keep us posted. Here was mine at week 3 of flower.
Looking good mate. I thought mine were gonna be tiny because this was 3 weeks ago . They took a while to get going just hoping for some decent stacking of the buds now