Life’s Good, especially if you have a G2X right now.  No, the G2X Gingerbread update is not coming OTA right now (just wait) but you can download Gingerbread for your G2X right now.  What you’ll need is a data cable, a Windows computer, your G2X and this LG Updater.  Should be quite simple.  I can understand if you want to wait for an official announcement and OTA update from T-Mobile, but for the rest of you, have fun!  Also, this will break root, so there’s that.

LG Updater

XDA Developers