I am playing 5e. I want to make a gearforged or warforged damage dealing character, probably fighter or paladin. Where would I look to find the stats or race page for the gearforged or warforged races?
Ask your DM, if he/she allows UA
Faerûn and Ravenloft are the only 5e settings with official published material to date, and there are no warforged native to Faerun or Ravenloft. Your DM might choose the Eberron setting, and if they do, they probably will use the related Unearthed Arcana materials, where you can find the warforged race description. (You have to ask because Unearthed Arcana is unfinished playtesting material.)
Your DM also might homebrew the race; ask your DM for the details.