Ballynahinch played into the breeze towards Slieve Croob in the first half and quickly settled into the game, winger Chris Quinn converting an long range effort into the breeze in the 8th minute.
Hinch gave away a soft penalty in the 10th minute and John McGookin coverted to make it 3 points apiece.
In the 17th minute a Quinn penalty took Hinch clear again 6-3, but Hinch infringed at the restart and McGookin levelled the score at 6-6.
It was a scrappy affair with both sides finding the heavy conditions and the slippy ball difficult to handle.
Gannon took the lead in the 24th minute thanks to quick thinking and fine individual skill from fullback Peter Nelson.
The ball squirted out of a ruck on the Hinch 22 and Nelson was quick to get his foot to it, hacking it past the Hinch defence then winning the race to the line to dive on the ball under the posts. McGookin added the extras to take Gannon clear 6-13.
The visitors enjoyed most of the play for the remainder of the first half with concluded with the Tyrone men leading by seven points 6-13.
The Hinch made the perfect start to the second half pressing the visitors onto the backfoot.
Blane McIlroy was the instigator of the Hinch attack hacking on then picking up a loose ball from the back of a Gannon scrum. The forwards continued the attack and eventually the ball was flashed right to find Stuart Morrow in space and he finished off the score. Quinn added the extras from the touchline to bring both sides back on level terms 13 point apiece.
McGookin missed a penalty attempt in the 6th minute then Quinn put Hinch in front when he converted a penalty goal after Stuart McCloskey was yellow carded for not rolling away in the tackle. Hinch lead 16-13.
Quinn added a further penalty and then score the second Hinch try after quick ball was released wide to the left in the 59th minute and Quinn beat the Gannon cover to cross in the corner. He failed to convert leaving the Hinch 24-13 clear
Both sides finished with 14 men after Paul Pritchard and Derek Hall were sidelined for seperate offences.
McIlroy tapped again feeding James Simpson who did extremely well to battle his way over under the posts. Quinn added the conversion to make it 31-13 and complete the scoring.