I think you mean DV 2010, and that you have ALREADY got your visa stamped on PP.
In that case its game over for your GF, sorry but that is the reality!
If you marry her now, then she will have a hard time even entering US on a F or B visa. In that case she will have to get her own H1b type visa to come to US
But if not married she could visit you often on B visa (I think). The only way she could get a GC now is via an H1B employment, she winning her own DV, wait for 5 years until you become citizen (provided you're then married to her and you have fulfilled 5yr/30 months residency requirement)
As far as your DV 2010 case is concerned, its closed after they issued you visa, you cannot add anyone anymore.( but for the sake of it ask KCC/embassy as well and confirm my point)
Good Luck !
PS: The easiest way I see that you can be together is.......DO NOT marry her now. You go to US and establish yourself (3-6 months). Get your GF to apply for a student visa, and then get her down.
After that , marriage for the next 5 years is OPTIONAL, however if you do and your GF has to renew her F visa, then it may be problematic.
Once you get settled in US you can get access to quality immg. law legal advise and act accordingly.
OR
You may marry her now and then when you get to US get legal advise and file for a family based GC right away. But it has its own pitfalls, mainly time (>3-5 yrs) and she will not get F or B visa during that time.