The bgc_optim repositories:
Directories containing code, runtime parameters, instructions: https://github.com/MITgcm-contrib/bgc_optim
Binary input files are available here: https://nasa-ext.box.com/s/2bxqmfoh3a1bulcp9mtwus3xyhpi83lw
There is also some miscellaneous information here: https://drive.google.com/drive/folders/1HwIRcJgB9LkHEchI7GlCC1aniMTE-AWB?usp=sharing