i stopped using go because it didn't have a good enough db access library (i like using ORMs for prototyping, and then see what really needs to be recoded with direct sql later).
Not sure how you did this, but this kind of data layer generation tools were pretty common in the early C# days, you should have a look and see how they worked. The main idea is to keep a "_generated" folder independant from the rest of your code, and let people enrich your models with methods in separate files (so that you can regenerate without breaking anything). But go makes all that pretty easy, so i assume it's already the case.
Another feature is to be able to configure how many foreign relationships are queries at the same time when you request one top object, to be able to optimize db access on the most common paths.
