There are 2 new Gate Mounting products on the market that solve various issues with installing a baby gate at a stairway.
The first the KidCo K12 Hole Free Gate Installation Kit is cleverly designed to fit on the wood banister posts that are often at the top or bottom of stairways. It fits onto round or square posts and allows you to install a baby gate without drilling into the decorative banister post. It has adjustable clamps, a wood strip and all the hardware needed to install a gate.
The second is the EZ Fit Gate Adapter. It attaches to virtually any stairway post in less than 5 minutes and provides a solid, smooth surface for attaching wall mounted or pressure mounted safety gates. It is portable and can be quickly reinstalled, with the safety gate, in a new location.
These prodcuts make it much easier to preserve your woodwork when installing baby gates.