I think "wired to the gills" has these basic meanings.
(1) a person high on drugs or stimulants.
(2) a person or structure connected to the rest of the world through a multitude of electronic and digital communication systems.
(3) a person or structure that is literally heavily wired up. For example a person whose body has many wires attaching it to monitoring equipment.
Here are some quick grabs from Google to illustrate these:
(1)
– Get Your Wings or Toys In the Attic, both awsome albums but the whole time they were all wired to the gills on cocaine.
– I've been used to essentially vibrating from caffiene all day. I've been able to get out of bed and stay standing up because I've been wired to the gills.
– If he weren't wired to the gills on ritalin and adderal. He would never make it through a whole show.
– Wired to the gills on sugar, I quickly reply, “I am in the stretch — I only have to finish up the rum balls, rice crispy treats and butter scotch haystacks…"
(2)
– We're wired to the gills, spending nearly all waking hours in front of TV and computer screens – bombarded, texting, Tweeting, clattering away – now even on airplanes.
– At high-tech conferences where everyone is already wired to the gills with BlackBerry pagers and cellphones and can cope easily with constant connectedness.
– Students say their school has "some of the best technological resources in the nation, [the] excellent classrooms are wired to the gills with laptop, Ethernet and wireless connections..."
(3)
– Many high-rises and apartment and condo complexes are wired to the gills with coaxial cable.
– Wired to the Gills: To calibrate the equipment, he is wearing three different ECG's (heart monitors) and two different blood pressure detectors. The cycle (velargometer) is almost identical to the one on the international space station.
not a teacher