Newb questions re GCO and STL

SketchUp 3D Printing
1

Hi

Daughter is using sketchup and needs to save files in GCO or .STL. Can you advise if sketchup can do this if so how does she do this. Sorry i am not tech minded at all.

2

For .stl there is an export import plugin available in the extension warehouse that works perfectly for me.
Have a look here. Extension | SketchUp Extension Warehouse

3

thank you for that Box