gpaw-data software package provides gpaw datasets/setups, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gpaw-data
gpaw-data is installed in your system.
Make ensure the gpaw-data package were installed using the commands given below,
$ sudo dpkg-query -l | grep gpaw-data *
You will get with gpaw-data package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | gpaw-data |
| Version | 0.9.20000-1 |
| Description | gpaw datasets/setups |
| Sub Section | Science |