Graphics Processing Unit (GPU) have been around for a while. Although they are primarily used for high-end 3D graphics processing, their use is now acknowledged for general massive parallel computing. This paper presents an original technique based on [10] to compute many instances of the longest common subsequence problem on a generic GPU architecture using classic DP-matching [7]. Application of this algorithm has been found useful to address the problem of filtering false positives produced by metrics-based clone detection methods. Experimental results of this application are presented along with a discussion of possibilities of using GPUs for other cloning related problems.