Anyway I can play gameboy on my iPhone?

Anyway I can play gameboy on my iPhone?

YES. You need to jailbreak your iPhone and need to know how to get around on using cydia. Explaining that here will take forever and you will probably get lost cause it is hard to explain through text. You are first going to have to jailbreak, then search on YouTube on how to get a gameboy emulator and a game on it.

On my phone I got an emulator called "Meboy"
It works as a mobile application with any gameboy or gameboy colour rom
You will need to look up and download Roms Online (Roms are the data of GB games eg. Pokemon yellow rom)

Here is a link for Meboy 2.2, the instructions of how to set up are on this page, I recommend having a usb to put the.jar files on your phone:
http://handheld.softpedia.com/get/Emulators/MeBoy-65783.shtml

To find some GB roms to play heres the site I used when I got it:
http://www.get-your-rom.com/roms/gb-game-boy
http://www.get-your-rom.com/roms/gbc-game-boy-color

I'm not 100% sure what phones it will work with but I recommend it for playing games on your phone also the sound might not be the best but all emulation is very good.

Hope this helps!