  The recently discovered substellar companion to GQ Lup possibly represents a
direct test of current planet formation theories.
  We examine the possible formation scenarios for the companion to GQ Lup
assuming it is a $\sim$2 M$_{Jup}$ object. We determine that GQ Lup B most
likely was scattered into a large, eccentric orbit by an interaction with
another planet in the inner system.
  If this is the case, several directly observable predictions can be made,
including the presence of a more massive, secondary companion that could be
detected through astrometry, radial velocity measurements, or scuplting in GQ
Lup's circumstellar disk. This scenario requires a highly eccentric orbit for
the companion already detected. These predictions can be tested within the next
decade or so. Additionally, we look at scenarios of formation if the companion
is a brown dwarf. One possible formation scenario may involve an interaction
between a brown dwarf binary and GQ Lup. We look for evidence of any brown
dwarfs that have been ejected from the GQ Lup system by searching the 2MASS
all-sky survey.
