We cannot say for certain if the bahia grass would be harmed or not by Gordons Ornamec 170 Grass Herbicide as this product is not specifically labeled for bahia. If you do not wish to harm the bahia, we would not recommend using this product as bahia is not labeled as tolerable. Also, if you are wanting to control the bahia, we cannot guarantee this product would work for your situation.
Gordons Ornamec 170 Grass Herbicide can only be used on cool season turf to remove bermuda, it can also injure the bahia. There is no selective product to remove one from the other really. Your best option would be to spot treat with a glyphosate based product and then reseed/sod the areas
Gordons Ornamec 170 Grass Herbicide is not labeled to control bermudagrass in bahiagrass. In your situation, it is recommended to spot treat the Bermuda with Round Up and kill it directly, and then replant Bahia in those areas. We do carry some professional round up products here.