Instructions and info are here.

source /cvmfs/icarus.opensciencegrid.org/products/icarus/setup_icarus.sh
setup icaruscode v09_78_06 -q e20:prof
python3 -m venv myenv
source myenv/bin/activate
pip install --upgrade pip
pip install PyQt5==5.15.6
pip install pyqtgraph==0.12.4
git clone https://github.com/coreyjadams/gallery-framework.git
cd gallery-framework
source config/setup.sh
cd $GALLERY_FMWK_BASEDIR
make
cd UserDev/EventDisplay/
source setup_evd.sh
make
evd.py -i <stage(0|1)_file.root>

To check which gallery-framework commit to use, login into a gpvm, then:

source /cvmfs/icarus.opensciencegrid.org/products/icarus/setup_icarus.sh
cd /icarus/app/TITUS/gallery-framework
git log

To check python package version:

cd /icarus/app/TITUS
source setup_TITUS.sh
pip list

source /opt/exp_software/icarus/titus/titus_v09_37_02_06/setup.sh
evd.py -i <file.root>

cd /opt/exp_software/icarus/DECAF
source scripts/setup_online.sh
cafe event_display.C <CAF file> 

For any kind of support refer to user-support@cnaf.infn.it