Don't know about making a group picture but you could make one picture with them. Would have to see your photos but you could try it this way
Paste each photo as a 'new layer' and crop to selection around each photo leaving a few pixels to the border of the photos to feather them without losing the photo. After you have all the layers added, feathered and positioned you can merge them. If you do the feathering they will look to be seamlessly put together. That's if you want to do it manually just with Gimp. Looks better too if you have a background on it of the main colour
A quicker way is to use the GMIC filter-Layers>Blend Seamless, after you have all your photos as you want them
Paste each photo as a 'new layer' and crop to selection around each photo leaving a few pixels to the border of the photos to feather them without losing the photo. After you have all the layers added, feathered and positioned you can merge them. If you do the feathering they will look to be seamlessly put together. That's if you want to do it manually just with Gimp. Looks better too if you have a background on it of the main colour
A quicker way is to use the GMIC filter-Layers>Blend Seamless, after you have all your photos as you want them
