GD-question about exercising

Jill
Hello fellow future moms.
I have been diagnoses with GD about two weeks ago. I'm now 23w4d pregnant.
It's hard but with insulin and dieting I haven't had an 'abnormal' value since three days. Gyneacologist isn't worried, endocrinologist isn't worried, I try not to worry. :-)
But I have a question; since a year or so I have a fitbit and try to reach 10000 steps every day. 
Now with the GD, does it matter when I take the steps? I normally go during the eventing, but would it be better if i went during the day? 
Is the positive effect of walking on GD a long-term thing or more direct, acute?
Thanks in advance!