Today ya'll learn how to make your text like this:

STEP 1: Right-click on your text layer then at' blending options'.

STEP 2: Click on the box beside 'gradient overlay' making a checkmark appear.

STEP 3: You can either download ready-made gradients or make your own. Click on the color box and choose if you already have downloaded or make your own by clicking where my arrow is pointed.

STEP 4: Then click on the color box and a new window will appear showing you all the colors. Pick your color and then press 'okay'.

STEP 5: Repeat the same steps on the other side and pick your second color and then press 'okay'. 

STEP 6: If you want more than 2 colors it is possible. Click in the middle where my arrow is pointing. A box will appear then click on it.

STEP 7: Choose your color and you may slide the box around to change the gradient effect. You can add more colors by repeating the above steps.

STEP 8: You can also change the opacity, angle, and scale of the gradient. You may check the reverse box and the whole gradient will turn upside down meaning the colors at the bottom will be shown at the top. You also have the option to change the blend mood.

And you're done!

Just search on Deviantart 'Gradient Packs'. You'll find lots! I hope this tutorial was helpful if was please do comment and if you don't feel free to ask questions.