gb progress has been slow for a long time; mainly due to personal issues.
Hopefully this will improve over the coming months.
There are several upcoming gb changes that may affect you.
gb version 0.4.4 is a bugfix release for the previous 0.4.3 release.
The 0.4 series focuses on improvements to project dependency management.
New features (since 0.4.3) depfile now supports tag=sometag in addition to version=semver. See #629 gb now uses the go/build package for parsing source code. The previous importer introduced over the Dec 2015 break has been removed. No user visible change is expected. @gliptak has added a bunch of code hygiene tools to the CI process, and subsequently fixed a lot of style and hygiene issues.
gb version 0.4.3 adds the ability to automatically download released dependencies.