I'm looking for a 2-in-1 tablet laptop that has Core i3 4130 CPU, GTX 750 Ti graphics card, 8GB DDR3 RAM, and an HD resolution. I want to use this for mainly gaming. My maximum cost is $300. Thanks in advance.
The GTX 750 Ti is a desktop GPU. You will never find that in a laptop.
For $300 you are only going to find a convertible laptop with low power Intel Atom CPU which is good enough for everyday use that is not demanding. For $300 you can buy the following Asus laptop with a Core i3-5020u, 4GB of RAM and uses the Intel HD 5500 graphics core.
The least expensive convertible laptop with a dedicated GPU is the $1,000 ThinkPad Yoga 14 which has nVidia 940m with DDR3 RAM which is a lot less powerful than the desktop GTX 750 Ti. The only other convertible laptop with a dedicated GPU is the Surface Book which has a nvidia 940m with DDR5 RAM instread of DDR3. That will set you back over $2,000.