Phantom phase power-law solution in $f(G)$ gravity
  Power-law solutions for $f(G)$ gravity coupled with perfect fluid have been studied for spatially flat universe. It is shown that despite the matter dominated and accelerating power-law solutions, the power-law solution exists for an special form of $f(G)$ when this universe enters a Phantom phase. 
A. R. Rastkar, M. R. Setare, F. Darabi
gr-qc