Common words:
* again
* angry
* finger
* hungry
* magic
* sugar
* tiger
* wagon
* gentle
* jungle
Less common words:
* aborigine
* aggregate
* aggravate
* agenda
* alligator
* geology
* nitrogen
* oxygen
* pigeon
* regiment
Words with "g" in a digraph:
* bridge
* change
* edge
* judge
* large
* orange
* strange
* village
This is just a small sample! There are many other words with "g" in the middle, and you can find more by using a dictionary or online word search tool.