Sorry, I doubt there is any plug in or filter to accomplish that. Even in depth enhanced formats such as exr (Industrial Light and Magic), what you see is what you get. If you cannot see under the clothes, you do not get under the clothes.
Your only choice is to break out the brush, use the image as a guide, and draw your own, without the clothing.
A way to add features that aren't present in the default GIMP installation
Plugins can normally be removed through the Control Panel. Go to 'Add Remove Software'.
There are no pictures in GIMP, they're all on your hard drive. Delete then just like any other file.
I use Gimp
you can find a gimp suit in a mission in the main storyline or type the cheat BEKKNQV
the clothes I have in my wardrobe in gta sa ps2 are valet unifom,croupier, gimp suit,pimp suit,spiderman,jeff hardy, and racing suit
If it comes in your browser then check your plugins or extension from there you can remove or disabled. Or use genuine updated antivirus to scan whole computer.
how do i remove ink stains from wet clothes
You can start Gimp by going to All Programs and selecting Gimp
gimp
GIMP can edit images to lighten or darken them. GIMP can create logos. GIMP can do many things, for more information and tutorials visit: thegimpking.blogspot.com
Gimp is completely free, it is even more: gimp is open source.