Sure gameboy color roms are a simple raw binary format so you can do shasum *.gbc and get a list of hashes to file names. Feel free to send me the list in a file. If you want to troubleshoot you can look at the csv here:
I can think of one issue. If these games were clones of a normal gameboy game just with added color they could be listed in thegamedb as gameboy and not gameboy color. I might just need to expand my search.