Group packages are managed using personal package archives, so they can be installed using the regular Ubuntu package manager. To add the LaTeX packages archive type the following:

$> sudo add-apt-repository ppa:solidsuccs/latexpackages
$> sudo add-apt-repository ppa:solidsuccs/codes
$> sudo apt update

If this works correctly you can search for group packages using apt search as below.

$> apt search solidsuccs

solidsuccs-course/xenial,now 2017.10.04-1 amd64
  Install course Latex class file

solidsuccs-presentation/xenial,now 2017.10.04-1 amd64
  Install a beamer template for the Solids research group

solidsuccs-reader/xenial,now 2018.02.10-2 amd64 [installed]
  Templated library of header files to do input file parsing

To install, use the regular apt install command

$> apt install solidsuccs-presentation
$> apt install solidsuccs-course
$> apt install solidsuccs-reader