Several things that have worked for me.
Gravity bleed does work. Nut unless you want a mess to clean up later, slip a hose over the nipple and into a bottle.
Use a metal oil can to fill the lines with fluid from the bleeder end.
You can also use an old brake fluid bottle 1/2 full with a hose. Loosen the bleeder screw on the wheel in question, slide the hose over the nipple and insert into the fluid. Pump the brake pedal 10-12 times. This way you are pulling fluid from 1 end and pushing from the other. Do each wheel and then check your pedal. Make certain the bottle has fluid in it or you will be pulling air into the system.
In every case the master cylinder was hardest to bleed. If I can I will bench bleed it.