GT and GTX are known to be graphic cards. These are high-performance cards that will allow you to play certain games depending on what your type is. GT is known to be the type of entry-level card that can be used for the different home theatre systems and so much more.
This can be used for some light games that you may want to play such as Minecraft. League of Legends is also another game that can be played well with the use of GT. If you would like to use GTX, this is something that you can use for some hardcore gaming.
For example, you would like to play GTA 5. You can expect that GTX can be very effective for various needs.