Gale is a boy that Katniss meets while hunting in the woods and eventually befriends. She recognized him as from a brief encounter at the Hall of Justice. Both she and Gale are the eldest child in their family. Both of their fathers were killed in the same mine explosion so both were called to the Justice Building to receive a medal of honor.
Katniss first meets Gale when she inspects some of his animal traps. He thinks she might be trying to steal his catch. Gale and Katniss eventually become friends and hunting partners. Gale has feelings for Katniss that go beyond just friendship, but Katniss has yet to realize these feelings.
She and Gale depend upon one another. They help each other provide for their families and they provide support for each other in such difficult times. Gale is often outspoken about the wrongs of the capital and Katniss is frequently his sounding board. Gale even agrees to protect and provide for Katniss's family when she leaves for the games.
Gale will come to play a more prominent role in the later novels.
I correct ans#3. He went to District 2.
And honestly, have you not even opened the book? It's like asking who Ron Weasley is in Harry Potter.
Gale is Katniss's best friend and they have known each other since they were children. They fell in love with each other and that caused turmoil to Katniss on whether or not she loves Peeta. He is also a part of District 12 and they depend upon each other.
Gale is a boy who is around Katniss's age and lives in district 12 with her. They both sneak illegally out of district 12 to hunt and bring food for their families. Gale has many brothes for whome he provides for with his hunting.
She briefly has a romantic relationship with him but ends up not marrying him. In the third book when everyone thinks she is crazy he leaves and goes to district one (and ends up with some other girl)
Katniss's hunting partner and long time freind
Gale's Katniss's best friend in the beggining of the 1st book who she used to illegally hunt with.