By plane: From the Barcelona Airport you can take the airport shuttle train (RENFE) to the Sants Station which is the final stop. The trip takes half an hour and there is a train every half an hour.
Once in Sants you can take a train (consult the timetable) that takes 1 hour and 30 minutes to the Girona Station.
From the station, the Campus Montilivi is 20 minutes walking or you can take a taxi (it costs only 4 or 5 euros) and ask for "Campus de Montilivi, Edifici P-IV, Universitat de Girona".
You can take the Girona's urban bus from the train station to the Campus Montilivi.
Girona has its own airport (Girona - Costa Brava Airport), with flights arriving from England, Germany, Belgium, Italy, France and Sweden (Ryanair). The Girona - Costa Brava Airport is 15 minutes far from the centre of the city (Taxi 18€).

Train company: http://www.renfe.es

Barcelona Airport: http://www.airwise.com/airports/europe/BCN/BCN_01.html

Girona Airport: http://www.aena.es

Ryanair : http://www.ryanair.com

By train: To Girona arrive trains from Europe and the rest of Spain, it also arrive regional lines trains.

From Barcelona, you can take a train to Girona at the stations of: Barcelona-Sants, Barcelona-Passeig de Gràcia and Barcelona-Clot Aragó.
There are trains every hour from 6.00 h to 21.00 h.

Lines:
Catalunya Express:
Girona - Barcelona (it takes 1 hour)

Talgo:
Girona - Madrid (it takes 9 hours)

RENFE
902 240 202

If you rent a car at the airport (you should book it in advance), there is a highway to Girona. Which is 100 Km from Barcelona. You can view this plane to arrive to Girona by highway through the exit 7 of the highway.
The roads linking with Girona are the following:

Norte:
Road AP7 (From Figueres- France) - Exit 6 - North of Girona
Road NII - From Figueres-France
Road C-66 - From Banyoles, Olot and Palamós

South:
Highway AP7 (From Barcelona) -Exit 7 - South of Girona
Road NII - From Barcelona's airport
Road C-25 - From Vic-Lleida

South-east:
Road C-65 - From Sant Feliu de Guíxols-Platja d'Aro

West:
Road N-141 - From Salt-Anglès

By bus: To Girona arrive national bus services and International ones.
The national and International lines stopping at the Girona's bus station (972 212 319) are the following:

Girona's urban bus: You can take it from the train station to the Campus Montilivi.

STARBÚS
902 153 655
http://www.starbus.es/

LINEBUS
972 224 908

SARFA
972 302 305
http://www.sarfa.es/

TEISA
972 204 868