Convert flif to grp Online: flif2grp
You can use Tom's Editor to easily convert images from
Free Lossless Image Format .FLIF to Screen 2 .GRP.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Free Lossless Image Format is an image format with extension FLIF.
Screen 2 is an image format with extension GRP.