A:AnswerThe pocket designed for the ipad DOES fits an 11" macbook Air perfectly.
I use that pocked to store my mecbook air and an iPad Mini.
The pocket has a padded devider that is perfect for both devices.
A:AnswerIt could be and it depends on how much gear you have for your go pro. Obviously it is more well set up for a camera like mine. I have a Nikon D3300 and that fits great with a 18-55mm and a 55-200 mm lens setup with some chargers , extra batteries and a few odds an ends. The access point to the padded compartment is on the back is something to keep in mind .
Hope that helps !