I would say in my opionion, dont buy it. My g2x was a piece of crap, and i regret giving LG another chance with the e980. My battery has gone bad (making the phone useless) and all LG support told me is to send it in for repair (how do you repair a battery?!?!?) and to include a receipt (somthing i dont have) but the phone should obviously be in warrenty as the date of manufacture is less then a year ago! This shipping would also would cost almost as much as buying a new battery and take twice as long. Horrible customer support(their phone lines were down as was their live chat and the customer support was completely unhelpful besides making sure that i knew that i couldnt get any resoulution without a receipt) , this phone will likely NEVER receive any android version updates(like the G2X never received ICS) and almost no developement seals this phones fate.
And as for G2x , My optimus 2x got ICS and your G2x was American version of O2x, So i think it also got it and if not then problem is with the Carrier as Lg Updated O2x from 2.2 to 2.3 and then to 4.0 ICS.