When does my GTA V Online code expire?

Normally xbox codes don't expire and if they expire it's most likely next year but if you want to be sure it should be in your email (if digitally purchased) or on the physical card it self like Smutches said

If the code has an expiration date it would be listed on the card or email if you got a digital code.

GTA V's multiplayer, GTA Online will be available 2 weeks after GTA V is released via a free code.

My friend has many problems when playing GTA V. We've played many games and only on GTA V Online will the problems occur.

Only when he is on GTA V Online, he will:

• Voice start to lag in the Xbox Live Party chat and may lag out/'leave' the Xbox Live Party many times
  
• His character ingame lags a lot, stuttering, teleporting around
• He will 'leave' the current free roam session
• He has gotten the 'You have been kicked by other players in the session' message multiple times
  

Playing other games, we have no issues at all and can play fine. Has anyone else had similar experience?

At this point it does seem like there are network issues with the GTA V Online code.

no doubt, i will start GTA V once Online launches. i have refrained from GTA V when i got it on launch, but come Oct 1st...going to start GTA V Online