I am certainly not Dr. Gish's agent or apologist, but, his career does seem to include practical application of science. Whether or not that qualifies as "actual accomplishments in science" I don't know...but I think it is worth considering.
I agree, but that's not the point I'm trying to make. I'm sure Gish has a lot of expertise in specific area(s) of biochemistry, but that doesn't de facto make him an expert at the subject of evolution. I know for certain he's made comments about the 2nd Law of Thermodynamics that are outright erroneous.
In any case, none of his broad opinions on evolution have made it into any peer-reviewed journals or literature. When someone bypasses the opinions of trained experts and takes their ideas straight to the public or press, as Gish is well-known for doing, it's a good sign that there's something awry with the science.