Where do I get Gapps without pc

I recently just rooted my phone (Nexus 6) and added custom ROM and custom back up for CM12 but when everything booted up there were no Google apps and I cannot download any apps as well bc there is no play store? How do I get Gapps on my phone without having to use a PC bc I got through this whole process without one so I need to finish it likewise and plus I do not have a computer yet.