Dave & Travis, thanks for your replies! I had looked at the WR Long Adapter but wasn't quite sure it would fit my loaders arms as I couldn't find any info specific to the GC2410 on their website. Good to know they make an adapter which should fit. Now to consider the details....
Obviously the GC2410 has limited FEL lift capacity already so I don't want to add anything too heavy. Quoting from the WR Long website description of the adapter plate, "...average weight is approximately 130 pounds".
@Travis, do you know the weight of the adapter designed for the DL100 loader? I looked at the link you sent and watched Ted's video but there are no specs listed. I assume that's because the adaptor specs are different for each loader.