What is Gift of Holy Spirit?
Special endowment from Holy Spirit given to those bearing testimony of the
Savior Jesus Christ the only begotten of God
Will Gift of Holy Spirit cease?
It will not. However some gifts of Holy Spirit may not be used all the times e.g. tongues speaking
Will the one speaks in tongues know what he is speaking?
Yes, because it is gift works for him just like prophetic gift works
for prophet.
If one who speaks in tongues will be out of control of the tongues he
is most probably controlled by the evil spirit because only evil spirit
tend to work by controlling
Will the Gift of Holy Spirit be given only after baptism ?
It is a endowment to the one with faith in Jesus Christ, not for
baptism, but of course the one with faith will surely receive
baptism. In Act 10 we learn the story of Cornelius and his household,
they had gift of Holy Spirit poured on them before baptism. One
important point is that gift of Holy Spirit will not always follow
one who do not have faith and baptism but always follow one with
faith and baptized.