s ▁activities ▁in ▁real ▁life . ▁ ▁On ▁September ▁ 2 7 , ▁ 2 0 0 7 , ▁after ▁C SI ' s ▁season ▁eight ▁premier ed , ▁a ▁mini ature ▁model ▁of ▁Gil ▁Gr iss om ' s ▁office ▁( which ▁he ▁was ▁seen ▁building ▁during ▁season ▁seven ) ▁was ▁put ▁up ▁for ▁au ction ▁on ▁e B ay . ▁The ▁au ction ▁ended ▁on ▁October ▁ 7 ▁with ▁the ▁prop ▁being ▁sold ▁for ▁US $ 1 5 , 6 0 0 , ▁which ▁CBS ▁don ated ▁to ▁the ▁National ▁Center ▁on ▁Add iction ▁and ▁Sub st ance ▁Ab use ▁Association . ▁ ▁C SI : ▁Crime ▁Sc ene ▁Investig ation ▁executive ▁producer ▁and ▁show runner ▁Carol ▁M end el so hn ▁cons iders ▁Gr iss om ▁the ▁center ▁of ▁the ▁show . ▁Gr iss om ▁has ▁received ▁positive ▁responses ▁from ▁critics , ▁ranking ▁number ▁ 8 2 ▁on ▁Bra vo ' s ▁ 1 0 0 ▁Great est ▁TV ▁Char acters ▁list , ▁along ▁with ▁Catherine ▁Will ows . ▁He ▁was ▁ranked ▁at ▁number ▁ 9 ▁on ▁S le uth ▁Channel ' s ▁poll ▁of ▁America ' s ▁Top ▁S le uth s . ▁A OL ▁TV ▁named ▁him ▁one ▁of ▁TV ' s ▁Sm art est ▁Det ect ives . ▁Gr iss om ' s ▁final ▁episode ▁as ▁a ▁regular ▁drew ▁over ▁ 2 3 ▁million ▁view ers . ▁ ▁Su cc ession ▁▁ ▁Gr iss om ▁initially ▁appears ▁as ▁the ▁Gra ve ▁Sh ift ▁Ass istant ▁Super visor