Some time later, Lord Oberon and Queen Titania returned to reclaim Avalon, trying to evict the Avalon Clan. Oberon prepared to destroy them, but at Titania's behest, he agreed to do battle with Goliath, Angela and Gabriel at the reduced strength of one of his Children. While the heroes of Avalon fought Oberon across the isle, Tom, Elisa, and other members of the Avalon clan created a weapon against Oberon, using Titania's clues- an iron bell.
Gabriel, Goliath, and Angela were defeated, but the remainder of the clan used the bell nearly to destroy Oberon. When Tom stopped just short of killing him, Oberon was impressed enough to make the Avalon clan his "Honor Guard of Avalon."
When Angela met Coldstone, she claimed that Gabriel was his biological son, but Coldstone dismissed it. 
Gabriel's biological parents are Coldstone and Coldfire, though this matters to no one (except perhaps Angela). Gabriel is a strong gargoyle possessing traits from both his biological parents. From his mother he inherited his hair coloring, and from his father he inherited his skin coloring and ear shape. His wings and horns seem to be amalgams of both his parents' features. He also has interesting brow ridges, two small horns on his chin, and two spikes on the end of his tail none of which his parents have (though Coldstone has a club on the end of his tail). It has been theorized that these traits come from a biological grandparent.
1. Awakening 2. Awakening, Part Two 3. Awakening, Part Three 4. Awakening, Part Four 5. Awakening, Part Five 6. The Thrill of the Hunt 7. Temptation 8. Deadly Force 9. Enter MacBeth 10. The Edge 11. Long Way to Morning 12. Her Brother's Keeper 13. Reawakening
1. Leader of the Pack 2. Metamorphosis 3. Legion 4. A Lighthouse in the Sea of Time 5. The Mirror 6. The Silver Falcon 7. Eye of the Beholder 8. Vows 9. City of Stone, Part One 10. City of Stone, Part Two 11. City of Stone, Part Three 12. City of Stone, Part Four 13. High Noon
27. Golem 28. Sanctuary 29. M.I.A. 30. Grief 31. Kingdom 32. The Hound of Ulster 33. Walkabout 34. Mark of the Panther 35. Pendragon 36. Eye of the Storm 37. The New Olympians 38. The Green 39. Sentinel
40. Bushido 41. Cloud Fathers 42. Ill Met By Moonlight 43. Future Tense 44. The Gathering, Part One 45. The Gathering, Part Two 46. Vendettas 47. Turf 48. The Reckoning 49. Possession 50. Hunter's Moon, Part One 51. Hunter's Moon, Part Two 52. Hunter's Moon, Part Three
1. The Journey 2. Ransom 3. Runaways 4. Broadway Goes Hollywood 5. A Bronx Tail 6. The Dying Of The Light 7. And Justice For All 8. Genesis Undone 9. Generations 10. ...For It May Come True 11. To Serve Mankind 12. Seeing Isn't Believing 13. Angels In The Night
SLG comic books
Gargoyles #1. Clan Building Chapter One: Nightwatch Gargoyles #2. Clan Building Chapter Two: The Journey Gargoyles #3. Clan Building Chapter Three: Invitation Only Gargoyles #4. Clan Building Chapter Four: Masque Gargoyles #5. Clan Building Chapter Five: Bash Gargoyles #6. Clan Building Chapter Six: Reunion * Gargoyles #7. Clan Building Chapter Seven: The Rock Gargoyles #8. Clan Building Chapter Eight: Rock & Roll Gargoyles #9. Clan Building Chapter Nine: Rock of Ages Gargoyles #10. Clan Building Chapter Ten: The Gate Gargoyles #11. Clan Building Chapter Eleven: Tyrants Gargoyles #12. Clan Building Chapter Twelve: Phoenix
Bad Guys #1. Strangers Bad Guys #2. The Lost Bad Guys #3. Estranged Bad Guys #4. Louse Bad Guys #5. Strangled Bad Guys #6. Losers
*Avalon, Part One - silhouette only
*Clan Building Chapter Six: Reunion - mentioned