I want fit a wooden garden side gate (1.9m x 0.9m). The hinge side
will be fixed to a wooden plate which will be screwed to the brick
wall of the house. The post on the latch side of the gate needs to be
fixed to a concrete fence post - the type where the fence panels slot
into either side. However the fence, and therefore the face of the
concrete post is at about a 30 degree angle to wall, so either the
post will need to be planned/sawn with one face at an angle, or a
square post plus some angled "spacers".

What's the best way to fix the gate post to the concrete post - can
these posts be drilled to take wall plugs (or frame fixings)?

Any advice appreciated.

(and no, I don't want to dig up the driveway to put the fence post
into the ground!).

Thanks, David.