"We will find a way, or we will make one."

or

"We will either find a way, or make one"

Something to that extent...

Hello.

Your phrase is on a gate at the University of Pennsylvania!
http://ccat.sas.upenn.edu/~jtreat/via.html

"Inveniemus viam aut faciemus."

See these Google results:
://www.google.com/search?hl=en&lr=&safe=off&q=+%22inveniemus+viam+aut+faciemus%22&btnG=Search

Breaking it down:

inveniemus = "we will find"
viam = "a way"
aut = "or"
faciemus= "we will make (it)"

----
search strategy:
my own knowledge of Latin, Google searches of "inveniemus viam," etc.

I hope this helps.