Convert grp to psd Online: grp2psd
You can use Tom's Editor to easily convert images from
Screen 2 .GRP to Adobe Photoshop
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Screen 2 is an image format with extension GRP.
PSD is in internal image format of Adobe Photoshop. It can store all the features offered by Photoshop, like layers and paths. Images can be compressed or not.