As an initialism gtg
is got to go (as a form of farewell.
As a noun gtt is
drop.
gtg
English
Initialism
(Initialism)
(head)
(Internet) got to go (as a form of farewell )
(Internet) get-together
(Internet) good to go
See also
* brb
gtt
English
Noun
(gtt)
(in prescriptions) drop