Making GMail App Default for Sending Email???

[gmace001]

I can't seem to figure this out. I was in the browser and wanted to email a picture to someone, so I held down on the pic and the option came up to save, or send through email. I said to send through email, but it only gives the option of Exchange or POP Account. I figured I would try to set up my gmail account as a POP account and send from there, which seemed like it worked, but I never received any email. Can anyone help?