Absolutely, one can be gay and a survivor.
I believe we are born with sexuality alone - with a preference one for the other or even both. THE CSA or being a survivor is a HUGE complication for ALL.
WE can be subdivided into being assaulted by A/one man or woman or a combination of men and women. This just complicates it.
After being "out" for 20 years AFTER being married and now during recovery of the CSA I am STILL and loving accept my attractions to men and women.
HOPE this helps, You will find your own path.