Is 140 too heavy to do gymnastics?

I used to do gymnastics when I was a little younger... but I quit I still love to do and I could still easily pick up again my back bends are really good and I'm good at tumble stuff I'm just worried that I might be too heavy to be picked up and stuff our guys at school aren't all that. You think I'll be okay..? If not how much should I lose and what should I do before school starts back up?