In your terminal type sudo synaptic
Synaptic Package Manager will open. In Quick search type “visual boy advance”. In the middle field should be two packages: visualboyadvance and visualboyadvance-gtk (if there isn’t choose Edit → Reload Package Information or just press Ctrl + R and try again). Check the two squares to the left choosing Mark for Installation. Press Apply and wait until all packages are downloaded and installed. Type (in terminal)
/usr/bin/VisualBoyAdvance to start application. Syntax is /usr/bin/VisualBoyAdvance [parameters] file so if I have .gba file in Desktop folder I could type /usr/bin/VisualBoyAdvance /home/special/Desktop/template_mb.gba to emulate it.