While TensorFlow itself does not offer any official implementation of the VGG architectures, neatly implemented VGG-16 and VGG-19 networks are available in the tensorflow/models GitHub repository (https://github.com/tensorflow/models). This repository, maintained by TensorFlow contributors, contains numerous well-curated state-of-the-art or experimental models. It is often recommended that you should search this repository when looking for a specific network.
We invite our readers to have a look at the VGG code there (currently available at https://github.com/tensorflow/tensorflow/blob/master/tensorflow/contrib/slim/python/slim/nets/vgg.py), as it reimplements the FCN version we described earlier.