I assume the OP means the VBAlinkreal fork that appeared many years ago. It allowed people to make a cable which worked like a link cable and went out to the GBA to allow link games to work that way. The specs for the cable were lost long when the binaries were still readily accessible and I don't think it was a known cable we otherwise have designs for.
If you really must you would probably be better off getting the gear to dump saves and using that. If you are attached to the GBA form factor there are ways to use a more common cable as a PC controller.