Here is the statement from Summit:

Lionsgate, Summit and the entire Twilight community are saddened by the death of a Comic-Con fan today due to a traffic accident during the hours leading up to this year’s convention in San Diego.  Our thoughts and condolences go out to the victim’s family and friends.  She will be respectfully remembered this Thursday in Hall H.

From us here at TST, our condolences and prayers go out to Gisela’s family.

For those that aren’t aware of the tragedy that occurred this morning at Comic-Con you can find more information here.