D.M.
M.,
It's been a few years so I don't remember the name - but I got a wooden gate at Baby's R Us 10 years ago. These brackets screw into the wall (Into the studs or with anchors), and the gate slids into the brackets on one end, then opens and closes on the other with another bracket on the wall. It is so great we still use it for our dog. Very steardy and easy to remove and also to open and close.
Good luck,
D.