Group photos in gimp help

[CLXcool]

Hey everyone. I've been meaning to update my topic of art with some of my recent studies I've learned in the night classes. But. I can't figure out how to put the drawings into one image to make things easier for me to upload. If I had it all in one image. i can explain the study sketches of mine better in one image rather than having them in separate images.

Does anyone know how to do group photos in gimp? I'd like for it to look like this. Having seperate images into one file.