A lot of people carry the G27 in an Ankle holster. The benefits of an ankle holster are comfort and extreme concealability. The disadvantage is that they are difficult to deploy while walking or running. If you will be sitting a lot (in your car, at your desk) it is a good choice.
When choosing a holster there are three things to consider
A good holster will be a balance of these three items. Generally speaking the more accessible it is the less concealable, the more concealable the less accessible…
Find a holster that will balance these three things with your daily needs.
I think an in the waistband (IWB) balances these three things well. They fit anywhere from the front of your body lined up with your zipper to the back of your body. You can wear a shirt over them or buy one that your shirt tucks (tuckable) over. I wear one on a near daily basis.
Here are a couple of my favorites for your gun. They are of course Galco holsters.
"Patriotism is supporting your country all the time, and your government when it deserves it." -Mark Twain