If you look at Dock's pic above, I flush mounted mine just above and a little forward of the shifters and my antenna is the same and actually mounted in the exact place. You have to be sure the gunwale is wide enough for the depth of the radio but it sure is a sweet place to put it. I hated to clutter up my dash and I'm 6'4" and didn't want my legs banging into it.

The issue I have with this location is that my stereo speakers are right there.

you can also mount the antenna that Dock Holiday posted inside and behind the drivers seat. I like the cleaner look IMHO.

On my dad's 29 outlaw, we used the same antenna but mounted it using a rail mount to the grab handle by the rear seat. Didn' have to drill any holes and it kept the outside of the boat looking clean.

Looks like you could mount the VHF unit just below and to the right of the steering wheel. That's where mine is and it is out of the way and easy to read and control. I also mounted a separate speaker on the gunwall next to the bolster. That helps a lot since it gets the speaker closer to your ear. It is still hard to hear clearly when you are on the throttles and standing in the wind. When setting down and cruising though it is fine.