How To Remove Background in GIMP 

How To Remove Background in GIMP
click 'Foreground Select'
create an outline
press 'Enter'
paint over the area
you can change the size of brush
click on the 'Select' button
wait
add 'Layer Mask'
click 'Selection'
click 'Add'
background is gone
dismiss the selection
click 'Paintbrush'
when you paint over an area it will be removed
when you switch the foreground to white it will bring back
click 'Filters: Gaussian Blur'
Export the image as .PNG